Chevy and BOP transmissions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Acavet · 01-21-2020, 09:46 PM

I recently purchased a nice 4x4 frame that came with a TH350 trans. The trans of course was intended to hook to a transfer case. I intend to run a solid axle front end without the differential. I’m having trouble locating a tail cone for the trans but ran across a cheap B.O.P 350. My question is would the tail cone and shaft fit my Chevy transmission?

**mongocanfly** · 01-21-2020, 11:02 PM

welcome..
i have no idea what a b.o.p. trans or engine is...but you have to have a 2wd output shaft as well ...be much easier to just find a 2wd trans...especially if you don't know the condition of what you have...

v30crewcab · 01-21-2020, 11:14 PM

only difference in the bop is the bellhousing. but you have to take the trans completely apart to change the tailshaft to a 2wd one.

v30crewcab · 01-21-2020, 11:21 PM

bop=buick olds pontiac bellhousing pattern.

**mongocanfly** · 01-21-2020, 11:24 PM

gotcha...never heard of bop before

Keith Seymore · 01-22-2020, 07:47 AM

Quote:

Originally Posted by mongocanfly

gotcha...never heard of bop before

Pronounced "Bee Oh Pee" if you ever have the opportunity.

K

Mike C · 01-22-2020, 08:57 AM

4x4 trans has a shorter main shaft than a 2x4. You can’t just add the tailhousing and make it work.

GRADYS Performance · 01-22-2020, 10:57 AM

If the BOP TH350 trans is a 2WD model the tailhousing and output shaft will fit your Chevy TH350. The transmission will have to be taken apart to change the output shaft because it is held internally by a snap ring. You could just use the BOP trans with a TCI Adapter Plate as the dowel pins and 2 of the bolt holes are the same between the 2 cases. Send Me a PM if you have any questions.

Acavet · 01-22-2020, 01:11 PM

Thank you....The transmission that came with the frame is supposedly rebuilt. I was not aware that the transmission needed to be disassembled to have a longer shaft installed. I thought the tail shaft was independent of the rest of the transmission.

I guess I’ll just sell the trans I have and buy another. I’d prefer a 400 any way.

**mongocanfly** · 01-22-2020, 02:09 PM

Thanks Keith..!!!...haha

GRADYS Performance · 01-22-2020, 02:11 PM

A TH400 will take a different yoke and mount than the TH350.

Quote:

Originally Posted by Acavet

Thank you....The transmission that came with the frame is supposedly rebuilt. I was not aware that the transmission needed to be disassembled to have a longer shaft installed. I thought the tail shaft was independent of the rest of the transmission.

I guess I’ll just sell the trans I have and buy another. I’d prefer a 400 any way.

01-21-2020, 09:46 PM	#1
Acavet Registered User Join Date: Jan 2020 Location: Cottonwood, Ca Posts: 2	Chevy and BOP transmissions I recently purchased a nice 4x4 frame that came with a TH350 trans. The trans of course was intended to hook to a transfer case. I intend to run a solid axle front end without the differential. I’m having trouble locating a tail cone for the trans but ran across a cheap B.O.P 350. My question is would the tail cone and shaft fit my Chevy transmission? Attached Images

01-21-2020, 11:02 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,583	Re: Chevy and BOP transmissions welcome.. i have no idea what a b.o.p. trans or engine is...but you have to have a 2wd output shaft as well ...be much easier to just find a 2wd trans...especially if you don't know the condition of what you have... __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-21-2020, 11:14 PM	#3
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 957	Re: Chevy and BOP transmissions only difference in the bop is the bellhousing. but you have to take the trans completely apart to change the tailshaft to a 2wd one. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535

01-21-2020, 11:21 PM	#4
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 957	Re: Chevy and BOP transmissions bop=buick olds pontiac bellhousing pattern. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535

01-21-2020, 11:24 PM	#5
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,583	Re: Chevy and BOP transmissions gotcha...never heard of bop before __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-22-2020, 08:57 AM	#7
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,709	Re: Chevy and BOP transmissions 4x4 trans has a shorter main shaft than a 2x4. You can’t just add the tailhousing and make it work. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

01-22-2020, 10:57 AM	#8
GRADYS Performance Registered User Join Date: Dec 2013 Location: Columbus, Oh Posts: 366	Re: Chevy and BOP transmissions If the BOP TH350 trans is a 2WD model the tailhousing and output shaft will fit your Chevy TH350. The transmission will have to be taken apart to change the output shaft because it is held internally by a snap ring. You could just use the BOP trans with a TCI Adapter Plate as the dowel pins and 2 of the bolt holes are the same between the 2 cases. Send Me a PM if you have any questions.

01-22-2020, 01:11 PM	#9
Acavet Registered User Join Date: Jan 2020 Location: Cottonwood, Ca Posts: 2	Re: Chevy and BOP transmissions Thank you....The transmission that came with the frame is supposedly rebuilt. I was not aware that the transmission needed to be disassembled to have a longer shaft installed. I thought the tail shaft was independent of the rest of the transmission. I guess I’ll just sell the trans I have and buy another. I’d prefer a 400 any way.

01-22-2020, 02:09 PM	#10
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,583	Re: Chevy and BOP transmissions Thanks Keith..!!!...haha __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver



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