FNG in Michigan needs some answers/help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nu arty boy · 12-04-2005, 08:08 PM

My name is Jason and I inherited my Grandfather's old '86 C-10. I'm actually a Jeep guy (1999 TJ, 2004 KJ) but I couldn't pass on picking up the chevy. It needs some work since it has been sitting outside for the last 5 years and not driven at all.

Long story short, it had the origional 4.3L ripped out and a 305 put in but kept the stock tranny (3speed auto) and radiator. The truck runs, but it seems like it doesn't have any power. Its got Eidelbrock 4bbl carb & intake and borla exaust but no balls...

My question is what kind of tranny would some of you experts recommend replacing the stocker with? TH400? 350? Is the V6 radiator going to work well enough with the 305 or am I going to have to worry about overheating problems?

rollinlow · 12-04-2005, 11:14 PM

welcome from tenn and a 700 would be great but a 350 would handle it easily

krue · 12-05-2005, 01:28 AM

Welcome to the board from South MIssissippi. Any tranny in good mechanical condition should stand up to a 305.

nu arty boy · 12-05-2005, 03:34 AM

There is the question of gearing also. I'm sure that the OE trans is geared to the V6. What are most of you guys running in a 2WD work truck? Ultimately this will become my project/daily driver - I'm not looking to take it to the strip or anything.

jgrh64 · 12-05-2005, 04:09 PM

hey there.The gearing for a V6 would be better since it needs more help to move the truck than a V8 ,try a 200r4

bad_burb · 12-05-2005, 08:30 PM

Welcome to the board from California.

If this truck will become your daily driver and you are planning a tranny swap already, I would use a OD trans like the 700 R4 or the 200 4R that was previously stated.

nu arty boy · 12-28-2005, 12:54 PM

And what is the wheel bolt pattern for this truck?

**Yukon Jack** · 12-29-2005, 04:09 PM

Welcome, I will let others who know the later model trucks answer your questions.

TrainD5115 · 12-31-2005, 01:13 AM

Quote:

Originally Posted by nu arty boy

And what is the wheel bolt pattern for this truck?

If it's a C10 it should have five lug rims. 1/4T = 5 lug
1/4T 4WD = 6 lug
3/4T = 8 lug
Welcome aboard.

nu arty boy · 12-31-2005, 01:43 AM

I know its 5 lug, but what is the spacing of the bolts? 5x4.5"? 5x 5.5"? 5x5"?

boxrodz · 12-31-2005, 02:12 AM

Quote:

Originally Posted by nu arty boy

I know its 5 lug, but what is the spacing of the bolts? 5x4.5"? 5x 5.5"? 5x5"?

Your bolt spacing would be 5 on 5.

BTW, I'm partial to 700R4s. The later models are desired more since they have been 'factory'-updated from the earlier offerings.

Russell · 12-31-2005, 03:53 AM

Your biggest reason for having no power is that 305 :P

They arn't well suited for a truck

If you want power, get a 350

Slonaker · 12-31-2005, 12:55 PM

I have an '86 with a 305. Its a slug.

If your truck has a 3 speed automatic, it is probably a TH350 or TH350C (lockup torque converter). There is no need to change it unless you want overdrive.

Slonaker

79BIG10 · 01-01-2006, 03:11 AM

Welcome to the board.

Also look at the rear gearing as well. As others mentioned the 305 is a alright engine for to and from but a 350 would defintely be a step up. But then it may be needed for a new radiator depending on how much core capacity it has.

The TH350 would be a ideal replacement for it but a TH400 would also be good. 700r4 with lower gear ratio like 3.73 or larger numerical may be better but depends on what your use of the truck will be.

12-04-2005, 08:08 PM	#1
nu arty boy Registered User Join Date: Nov 2005 Location: Michigan Posts: 17	FNG in Michigan needs some answers/help My name is Jason and I inherited my Grandfather's old '86 C-10. I'm actually a Jeep guy (1999 TJ, 2004 KJ) but I couldn't pass on picking up the chevy. It needs some work since it has been sitting outside for the last 5 years and not driven at all. Long story short, it had the origional 4.3L ripped out and a 305 put in but kept the stock tranny (3speed auto) and radiator. The truck runs, but it seems like it doesn't have any power. Its got Eidelbrock 4bbl carb & intake and borla exaust but no balls... My question is what kind of tranny would some of you experts recommend replacing the stocker with? TH400? 350? Is the V6 radiator going to work well enough with the 305 or am I going to have to worry about overheating problems?

12-04-2005, 11:14 PM	#2
rollinlow Registered User Join Date: Sep 2005 Location: tn Posts: 206	Re: FNG in Michigan needs some answers/help welcome from tenn and a 700 would be great but a 350 would handle it easily

12-05-2005, 01:28 AM	#3
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: FNG in Michigan needs some answers/help Welcome to the board from South MIssissippi. Any tranny in good mechanical condition should stand up to a 305. __________________ "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"

12-05-2005, 03:34 AM	#4
nu arty boy Registered User Join Date: Nov 2005 Location: Michigan Posts: 17	Re: FNG in Michigan needs some answers/help There is the question of gearing also. I'm sure that the OE trans is geared to the V6. What are most of you guys running in a 2WD work truck? Ultimately this will become my project/daily driver - I'm not looking to take it to the strip or anything.

12-05-2005, 04:09 PM	#5
jgrh64 Prestige member Old Farts Club Join Date: Nov 2005 Location: Cleveland Posts: 502	Re: FNG in Michigan needs some answers/help hey there.The gearing for a V6 would be better since it needs more help to move the truck than a V8 ,try a 200r4 __________________ Hey sombodys gotta do it!

12-05-2005, 08:30 PM	#6
bad_burb Registered User Join Date: Aug 2005 Location: Vallejo, California Posts: 659	Re: FNG in Michigan needs some answers/help Welcome to the board from California. If this truck will become your daily driver and you are planning a tranny swap already, I would use a OD trans like the 700 R4 or the 200 4R that was previously stated. __________________ '73 C-30 3+3 Dually 454/TH400 '74 Fleetside 350/TH350 (SOLD) '69 Nova 350/TH350 (project FOR SALE) '63 Nova 305/TH350 3.73 posi (the wife's project)

12-28-2005, 12:54 PM	#7
nu arty boy Registered User Join Date: Nov 2005 Location: Michigan Posts: 17	Re: FNG in Michigan needs some answers/help And what is the wheel bolt pattern for this truck?

12-29-2005, 04:09 PM	#8
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	Re: FNG in Michigan needs some answers/help Welcome, I will let others who know the later model trucks answer your questions. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

12-31-2005, 01:43 AM	#10
nu arty boy Registered User Join Date: Nov 2005 Location: Michigan Posts: 17	Re: FNG in Michigan needs some answers/help I know its 5 lug, but what is the spacing of the bolts? 5x4.5"? 5x 5.5"? 5x5"?

12-31-2005, 03:53 AM	#12
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Re: FNG in Michigan needs some answers/help Your biggest reason for having no power is that 305 :P They arn't well suited for a truck If you want power, get a 350 __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

12-31-2005, 12:55 PM	#13
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: FNG in Michigan needs some answers/help I have an '86 with a 305. Its a slug. If your truck has a 3 speed automatic, it is probably a TH350 or TH350C (lockup torque converter). There is no need to change it unless you want overdrive. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

01-01-2006, 03:11 AM	#14
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	Re: FNG in Michigan needs some answers/help Welcome to the board. Also look at the rear gearing as well. As others mentioned the 305 is a alright engine for to and from but a 350 would defintely be a step up. But then it may be needed for a new radiator depending on how much core capacity it has. The TH350 would be a ideal replacement for it but a TH400 would also be good. 700r4 with lower gear ratio like 3.73 or larger numerical may be better but depends on what your use of the truck will be. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson



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