5 Speed manual - 250 Inline 6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mt Man Chad · 08-28-2007, 06:18 PM

has anybody put a newer 5 speed with overdrive behind a 250 six cylinder.

I cam across a newer 5 speed trans for free and just wondering if anybody has put one in these with a six banger?

LUV2XCLR8 · 08-28-2007, 06:19 PM

Not that I know of, but in theory it should work, I wanna know also

mvfd70 · 08-28-2007, 06:58 PM

I havn't done it yet but that is what i'm planning on doing. As far as I know it'll fit since the I6 bolt pattern is the same as the SBC

**john** · 08-28-2007, 06:58 PM

Brad has a T-5 behind his 250.

**special-K** · 08-28-2007, 07:57 PM

Sure would be a contemporary mod with high gas prices.I`ve given it thought so my son can enjoy these gems.

Brad · 08-29-2007, 02:51 AM

Yep, I've got a Camaro T-5 in mine. It's the easiest 5 speed to install. S-10 T-5's require more work but can be made to fit. What trans did you get?

krue · 08-29-2007, 02:54 AM

I think it would be a good match.

Brad · 08-29-2007, 02:54 AM

The big problem with Camaro T-5's now is that every jackass wrecking yard wants to make you pay through the nose for these in the NW and it makes it harder to justify when you do the math.

Mt Man Chad · 08-29-2007, 10:13 AM

I picked up a T5 from a small local yard. I swapped for a few free parts I had laying around and had no plans for!

Hey Brad - can you post some pics of your T5 setup and cross member PLEASE !!!!

Big D · 08-29-2007, 10:54 PM

What bellhousing do you need for this swap?

I know of a couple of late 80's S-10's that are going to the crusher soon . One is a 4-banger, the other is a 2.8. I remember reading somewhere that the 4.3 ones would bolt up direct. I too would like to see some pics if you get a chance.

BCOWANWHEELS · 08-29-2007, 11:52 PM

bbetter off with a nv4500. those t-5,s are problem prone

**Stephen717** · 09-26-2019, 02:06 PM

To revive this thread which nv4500 would I be looking for so that 1st gear isn't too low and 5th gear isn't useless unless you're doing 80 mph

Bigdav160 · 09-26-2019, 05:52 PM

The NV4500 is a HD low shifting truck transmission with a granny low. I don't believe there were a lot of gear options

It would overkill behind a six cylinder.

Beuford · 09-26-2019, 07:16 PM

Quote:

Originally Posted by Mt Man Chad

has anybody put a newer 5 speed with overdrive behind a 250 six cylinder.

I cam across a newer 5 speed trans for free and just wondering if anybody has put one in these with a six banger?

I put a NV3500 from a `93 in a 70 c-20 and used the hump from a 4 spd. The shifter hole was in the right spot. I had to slide the cross member back and used a driveshaft yoke from a turbo 400. Pm me with your e-mail and I'll send you the microsoft word docs with all the changes. I used the hyd clutch.

**Stephen717** · 09-26-2019, 07:34 PM

I have a 250 that I want to do the top end on, cam timing gears, port and polish the head, it already has a 2 jet on it, and headers. I don't know what transmission would be good behind the l6 with that work done and a set of 4.10 rear gears. I want to swap to a 5 speed to upgrade the Saginaw 3 speed. What would you guys recommend

67swb72klb · 09-26-2019, 07:40 PM

From what people say the biggest thing is having enough toque to use the O/D so the gearing is huge..

**LockDoc** · 09-26-2019, 09:04 PM

-
I installed an '89 S-10 5 speed in my '67 with a six cyl a while back. It works great! I purchased the spacer plate and used the '85 Astro van 11" clutch disk. I didn't have to use the adapter ring in the bell housing locator hole, it was the right size for the S-10 front bearing retainer.

Here is where the '89 shifter is in relation to the bench seat. I bent the shift lever straight up from where the sharp bend was and it worked pretty good. It isn't as close to the dash as it looks. The shifter on it now is off of a full size pickup 5 speed and it is too big to screw on the shaft and too long. I just slid it down over the shift lever so I could test drive it.

The yellow circle shows where the original shifter hole was and the new hole is about 8-1/4" back.

Here is a thread with some S10 swap info:

http://67-72chevytrucks.com/vboard/s...d.php?t=434512

Here is the thread where I installed an NV4500 in my '72 dually. It is behind a 350 but I think everything would be the same for an I6.

http://67-72chevytrucks.com/vboard/s...d.php?t=673588

LockDoc

57Suburb · 09-27-2019, 01:09 PM

Here's my T5 install using the Camaro version and a shift relocater. I've added a lokar shift lever since then for better clearance with seat.

mr.precision · 09-28-2019, 11:15 AM

I have a T5 behind a 283 in my '41 Ford Pickup.
5th gear on it is absolutely useless. It drops the RPM so much that the motor is turning 1500 RPM at 60 MPH.
I don't know if all T5's are like this and I don't know what gear ratio the old truck has. I drove it yesterday and recall that it was running around 2500 RPM at 60 MPH in fourth gear. I never shift it to 5th even at 70 MPH.
Just FYI.

geezer#99 · 09-28-2019, 11:29 AM

Quote:

Originally Posted by mr.precision

I have a T5 behind a 283 in my '41 Ford Pickup.
5th gear on it is absolutely useless. It drops the RPM so much that the motor is turning 1500 RPM at 60 MPH.
I don't know if all T5's are like this and I don't know what gear ratio the old truck has. I drove it yesterday and recall that it was running around 2500 RPM at 60 MPH in fourth gear. I never shift it to 5th even at 70 MPH.
Just FYI.

There’s a lesson to be learned right there.
Most motors aren’t happy running below 2200 rpm.

With your info it would appear you have around a 3.50 rear gear. Depending on rear tire size.
Here’s a handy calculator for you.

http://www.advanced-ev.com/Calculators/TireSize/

57Suburb · 09-28-2019, 01:29 PM

Quote:

Originally Posted by mr.precision

I have a T5 behind a 283 in my '41 Ford Pickup.
5th gear on it is absolutely useless. It drops the RPM so much that the motor is turning 1500 RPM at 60 MPH.
I don't know if all T5's are like this and I don't know what gear ratio the old truck has. I drove it yesterday and recall that it was running around 2500 RPM at 60 MPH in fourth gear. I never shift it to 5th even at 70 MPH.
Just FYI.

Yep, you have to do your homework with the T5. Depending on which vehicle it came from, there are many ratios to choose from, but in your case, it sounds more like a rear end ratio problem. Needs to be a 3.73 or 4.10 to be in the right ballpark for a useful 5 gear.
Posted via Mobile Device

factorystock · 09-28-2019, 04:40 PM

Quote:

Originally Posted by mr.precision

I have a T5 behind a 283 in my '41 Ford Pickup.
5th gear on it is absolutely useless. It drops the RPM so much that the motor is turning 1500 RPM at 60 MPH.
I don't know if all T5's are like this and I don't know what gear ratio the old truck has. I drove it yesterday and recall that it was running around 2500 RPM at 60 MPH in fourth gear. I never shift it to 5th even at 70 MPH.
Just FYI.

This is the problem with modern overdrives, the .73 overdrive gear is too high. There were 5 speeds used in medium duty trucks ( Clark and Spicer ) with the overdrive gear being .80 which, IMO, would be a more desirable and useable in a heavier vehicle. Why the light truck transmission industry settled on a .73 is a bit odd, I'd rather see a .80 for a light truck.

**Stephen717** · 09-28-2019, 07:00 PM

Well I might have a junkyard source for Clark 5 speeds. Which one would I want to look for if I was to get one of those. It's a 3/4 ton truck after all, not a racecar

factorystock · 10-05-2019, 07:34 PM

The Clark 280V0 has a .80 overdrive. Was optional on c50 c60 series.

08-28-2007, 06:18 PM	#1
Mt Man Chad Registered User Join Date: Oct 2006 Location: Oakridge Oregon Posts: 1,865	5 Speed manual - 250 Inline 6 has anybody put a newer 5 speed with overdrive behind a 250 six cylinder. I cam across a newer 5 speed trans for free and just wondering if anybody has put one in these with a six banger? __________________ 68 CST SWB - Gold/White 50th anniversary /TH350/Buddy Buckets/3.73 Posi/dogdish caps. 68 K10 Burb - Gold/White 327/SM465/NP205/3.73 "Daa Burb" build thread

08-28-2007, 06:19 PM	#2
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,470	Re: 5 Speed manual - 250 Inline 6 Not that I know of, but in theory it should work, I wanna know also __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Big Piggy: "Goliath" 07 Kodiak C4500 Lil Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

08-28-2007, 06:58 PM	#3
mvfd70 Registered User Join Date: Jan 2007 Location: Opdyke, IL Posts: 775	Re: 5 Speed manual - 250 Inline 6 I havn't done it yet but that is what i'm planning on doing. As far as I know it'll fit since the I6 bolt pattern is the same as the SBC __________________ 1978 Chevrolet Silverado 3/4 ton 400 small block. 2000 F-250 Powerstroke 2002 GMC Yukon Denali XL

08-28-2007, 06:58 PM	#4
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: 5 Speed manual - 250 Inline 6 Brad has a T-5 behind his 250. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

08-28-2007, 07:57 PM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 5 Speed manual - 250 Inline 6 Sure would be a contemporary mod with high gas prices.I`ve given it thought so my son can enjoy these gems. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-29-2007, 02:51 AM	#6
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Re: 5 Speed manual - 250 Inline 6 Yep, I've got a Camaro T-5 in mine. It's the easiest 5 speed to install. S-10 T-5's require more work but can be made to fit. What trans did you get? __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

08-29-2007, 02:54 AM	#7
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: 5 Speed manual - 250 Inline 6 I think it would be a good match. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

08-29-2007, 02:54 AM	#8
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Re: 5 Speed manual - 250 Inline 6 The big problem with Camaro T-5's now is that every jackass wrecking yard wants to make you pay through the nose for these in the NW and it makes it harder to justify when you do the math. __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

08-29-2007, 10:13 AM	#9
Mt Man Chad Registered User Join Date: Oct 2006 Location: Oakridge Oregon Posts: 1,865	Re: 5 Speed manual - 250 Inline 6 I picked up a T5 from a small local yard. I swapped for a few free parts I had laying around and had no plans for! Hey Brad - can you post some pics of your T5 setup and cross member PLEASE !!!! __________________ 68 CST SWB - Gold/White 50th anniversary /TH350/Buddy Buckets/3.73 Posi/dogdish caps. 68 K10 Burb - Gold/White 327/SM465/NP205/3.73 "Daa Burb" build thread

08-29-2007, 10:54 PM	#10
Big D Registered User Join Date: Apr 2005 Location: Dunlap, IL Posts: 308	Re: 5 Speed manual - 250 Inline 6 What bellhousing do you need for this swap? I know of a couple of late 80's S-10's that are going to the crusher soon . One is a 4-banger, the other is a 2.8. I remember reading somewhere that the 4.3 ones would bolt up direct. I too would like to see some pics if you get a chance. __________________ 68 GMC 64 1/2 Mustang convert A bachelor's life is no life for a single man." - Samuel Goldwyn

08-29-2007, 11:52 PM	#11
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: 5 Speed manual - 250 Inline 6 bbetter off with a nv4500. those t-5,s are problem prone __________________ I BELIEVE IN JOHN 3:16

09-26-2019, 02:06 PM	#12
Stephen717 Senior Member Join Date: Aug 2016 Location: Loris South Carolina Posts: 428	Re: 5 Speed manual - 250 Inline 6 To revive this thread which nv4500 would I be looking for so that 1st gear isn't too low and 5th gear isn't useless unless you're doing 80 mph

09-26-2019, 05:52 PM	#13
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 5 Speed manual - 250 Inline 6 The NV4500 is a HD low shifting truck transmission with a granny low. I don't believe there were a lot of gear options It would overkill behind a six cylinder. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

09-26-2019, 07:34 PM	#15
Stephen717 Senior Member Join Date: Aug 2016 Location: Loris South Carolina Posts: 428	Re: 5 Speed manual - 250 Inline 6 I have a 250 that I want to do the top end on, cam timing gears, port and polish the head, it already has a 2 jet on it, and headers. I don't know what transmission would be good behind the l6 with that work done and a set of 4.10 rear gears. I want to swap to a 5 speed to upgrade the Saginaw 3 speed. What would you guys recommend

09-26-2019, 07:40 PM	#16
67swb72klb Registered User Join Date: Dec 2010 Location: livingston co.mi Posts: 2,449	Re: 5 Speed manual - 250 Inline 6 From what people say the biggest thing is having enough toque to use the O/D so the gearing is huge.. __________________ California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project



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09-26-2019, 09:04 PM	#17
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,350	Re: 5 Speed manual - 250 Inline 6 - I installed an '89 S-10 5 speed in my '67 with a six cyl a while back. It works great! I purchased the spacer plate and used the '85 Astro van 11" clutch disk. I didn't have to use the adapter ring in the bell housing locator hole, it was the right size for the S-10 front bearing retainer. Here is where the '89 shifter is in relation to the bench seat. I bent the shift lever straight up from where the sharp bend was and it worked pretty good. It isn't as close to the dash as it looks. The shifter on it now is off of a full size pickup 5 speed and it is too big to screw on the shaft and too long. I just slid it down over the shift lever so I could test drive it. The yellow circle shows where the original shifter hole was and the new hole is about 8-1/4" back. Here is a thread with some S10 swap info: http://67-72chevytrucks.com/vboard/s...d.php?t=434512 Here is the thread where I installed an NV4500 in my '72 dually. It is behind a 350 but I think everything would be the same for an I6. http://67-72chevytrucks.com/vboard/s...d.php?t=673588 LockDoc Attached Images __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 09-26-2019 at 09:09 PM.

09-27-2019, 01:09 PM	#18
57Suburb Registered User Join Date: Apr 2014 Location: Southern Iowa Posts: 306	Re: 5 Speed manual - 250 Inline 6 Here's my T5 install using the Camaro version and a shift relocater. I've added a lokar shift lever since then for better clearance with seat. Attached Images __________________ 1972 C30 Grain Hauler, 350/400 1967 1500 GMC Stepside SWB, In Transformation Process 1967 RS/SS Camaro 350/TKO600

09-28-2019, 11:15 AM	#19
mr.precision Registered User Join Date: Feb 2018 Location: Fountain Hills, AZ Posts: 161	Re: 5 Speed manual - 250 Inline 6 I have a T5 behind a 283 in my '41 Ford Pickup. 5th gear on it is absolutely useless. It drops the RPM so much that the motor is turning 1500 RPM at 60 MPH. I don't know if all T5's are like this and I don't know what gear ratio the old truck has. I drove it yesterday and recall that it was running around 2500 RPM at 60 MPH in fourth gear. I never shift it to 5th even at 70 MPH. Just FYI.

09-28-2019, 07:00 PM	#23
Stephen717 Senior Member Join Date: Aug 2016 Location: Loris South Carolina Posts: 428	Re: 5 Speed manual - 250 Inline 6 Well I might have a junkyard source for Clark 5 speeds. Which one would I want to look for if I was to get one of those. It's a 3/4 ton truck after all, not a racecar

10-05-2019, 07:34 PM	#24
factorystock Registered User Join Date: Feb 2007 Location: west coast Posts: 3,357	Re: 5 Speed manual - 250 Inline 6 The Clark 280V0 has a .80 overdrive. Was optional on c50 c60 series.

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