700R4 or not ?

Okay, i pulled a thm350 and a 305 out of a 84 monte carlo, then i pulled the v6 2.8L and the transmission out of my 88 camaro. I called rose chevrolet (a local chevrolet dealership) and i was told that in my 88', they used a 700r4 for every motor and that my v6 definately had a 700r4 in it because of a number on the service suply code of the car that read "MD8" or something like that. Okay, so I was pretty happy, then I pulled the transmission off of my 2.8L and i measured the bolt holes and there is no way in hell that transmission will bolt up to the housing of my 305. ill kind of show yall that the bell housing looks like. this is what the bell housing looks like on the 88 camaro trans. o o

o o

o o


and heres what the housing looks like on my 305 motor....


o
o o

o o

.......so its obvious i cant bolt up the two together when you compare the bolt patterns above ^^^ and the housing pattern off of my 305, which is what all chevy v8 housings look like. so Im guessin i dont have a 700r4 and now i have no idea what transmission i have. If somebody could help me, please id appreciate it. Thanks a lot to anybody that can help.


oh ps, the housing on the 88 transmission looks like a triangle thats cut off half way up strait across.

but the housin on a chevy v8 looks like a triangle that comes to a point on the top and it kind of rounded. I just need to nkow what type of tranny i have in my 2.8L.

you have a 700R4, but a different outter case and bellhousing than the V8 model transmissions. basically youve got a different transmission on the outside, but the guts are the same.

your problem is that the V6 engines are 60 degree V's and the small block chevy is a 90 degree V, meaning it has a wider bellhousing. and why they dont match up. so technically the dealership was right, did you tell them you planned on using the transmission on a V8??

you have a 700R4, but a different outter case and bellhousing than the V8 model transmissions. basically youve got a different transmission on the outside, but the guts are the same.

your problem is that the V6 engines are 60 degree V's and the small block chevy is a 90 degree V, meaning it has a wider bellhousing. and why they dont match up. so technically the dealership was right, did you tell them you planned on using the transmission on a V8??


I dont think i did. but how hard is it to rip out the guts of the 700r4 of the 88 camaro trans and put it in a casing that will fit a chevy v8 ? and since i already have a turbo 350, is it possible to just put everything thats in the 700r4 in the casing for the turbo 350 ? and one other question, If i go with a thm 350, i gotta buy a torque arm adapter so the torque arm will bolt up correctly. Now you saaid that the 700r4 has a couple different outter casings, one with a 60 and one with a 90 degree v. Now, if theyre the same inside, can i just buy a 700r4 casing and use it, so that i dont need a torque arm adapter on the end where the drive shaft meets the transmission ? ya get what im saying ? im asking on the end of the trans where the drive shaft meets it, is it the same shape on that side for both outter casings ?

ok, the answer is in my post. if you find an empty V8 casing for a 700R4, you can swap the guts, but if it was me i would just get a 700R4 out of a doner car and have it rebuilt by a transmission specialist. if you dont know automatic transmissions, dont try it yourself. and no you cant put the 700R4 guts into a TH750 case, they are completely different, its like trying to put V8 parts in a V6, just wont work. Only thing i can say is try to turn the sixer 700R4 in as a core on a V8 unit, and sell the TH350 to help fund the project.

they are completely different, its like trying to put V8 parts in a V6, just wont work.

My intake fits V8 also

I have a v8 exhaust

I will be putting LS1 injectors in because mine are maxing out (anyone selling ls1 injectors??)

THere are other LS1 parts that people have used in V6's

ok, the answer is in my post. if you find an empty V8 casing for a 700R4, you can swap the guts, but if it was me i would just get a 700R4 out of a doner car and have it rebuilt by a transmission specialist. if you dont know automatic transmissions, dont try it yourself. and no you cant put the 700R4 guts into a TH750 case, they are completely different, its like trying to put V8 parts in a V6, just wont work. Only thing i can say is try to turn the sixer 700R4 in as a core on a V8 unit, and sell the TH350 to help fund the project.


Hey thats a great idea. I think ill just use my old 700r4 tranny and possible my 350 turbo to fund the project. dam i never thought about that. Ill probably just rebuild it myself. Im confident i can do it but whop knows if ill actually do it or not. thanks for all the help. I appreciate it. Id be up sh*t vreak without a paddle if it werent for all the help i got on here.

marcus R.

My intake fits V8 also

I have a v8 exhaust

I will be putting LS1 injectors in because mine are maxing out (anyone selling ls1 injectors??)

THere are other LS1 parts that people have used in V6's


smartass, i was kinda talking about engine internals, like the crankshaft and camshaft and such, ya know, im willing to bet that you even have a few generic bolts that will transferr from one engine to another..... geeze the things i put up with ;)

oh and um, you arent saying that your intake manifold will fit a V8 are you?????

smartass, i was kinda talking about engine internals, like the crankshaft and camshaft and such, ya know, im willing to bet that you even have a few generic bolts that will transferr from one engine to another..... geeze the things i put up with ;)

oh and um, you arent saying that your intake manifold will fit a V8 are you?????

lol, with a big enough hammer anything will fit anything... rember square peg into round hole... just need a 15lb sledge hammer

no but an LS1 throttle body would fit on my engine

will the tailshaft of a 700r4 bolt onto a TH350?

dunno, its just a four bolt rectangle. simple measurements would tell ya.

and again, i was talking about internal parts, that dont match up, he was talking about putting internals from the 700R4 into the TH350, so i compaired it to putting V8 internals into a V6.

will the tailshaft of a 700r4 bolt onto a TH350?


if your asking if they have the same torqu arm set up in the rear end, then the answer is no. you have to buy a torque arm adapter from jegs or summit to put any 350 trans into a camaro if your coming from a 200 or 700r4. since im puttin in a turbo 350, im gonna need one. now the fun part is getting the transmission mounts in right since im totally switchin trannys.

i need a torque arm adaptor too....does anyone have a link to a site to get one.

i need a torque arm adaptor too....does anyone have a link to a site to get one.


yeah. call jegs at 1800 345 4545. Its called a torque arm adapter and its 80 bucks.

if your asking if they have the same torqu arm set up in the rear end, then the answer is no. you have to buy a torque arm adapter from jegs or summit to put any 350 trans into a camaro if your coming from a 200 or 700r4. since im puttin in a turbo 350, im gonna need one. now the fun part is getting the transmission mounts in right since im totally switchin trannys.

the tranny mount doesn't change when you swap the V6 700r4 for the V8. same location, same crossmember, same tranny mount, same driveshaft. Why are you going with a th350? There is no benefit to it (unless you are building this car the drag track). Gearing is better in 700r4 and gas mileage will be better. No need to change driveshaft, buy adapters, or anything. And you can find them cheap. I got mine for $75 and built it to withstand 450+ horses with less than $400.

P.S. This is a drawing of your brain.
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This is your brain on drugs while trying to draw pictures with text on the internet to prove a point.
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Any questions?
Just don't do it.

in answer to the first question, i vote both :)

well, first of all you need to calm down. it was a joke. secondly I have done it myself, I have swapped my V6 engine and tranny for a V8 engine and V8 700R4, and the mounts are exactly the same. Had you read my signature you would have known this. thirdly, I was not preaching to you, I was asking you a question and offering a suggestion.

I made no idiotic remarks. Just looks like you are easily excited. Somebody needs to turn that frown upside down. :frown:

No need for the drama.

[QUOTE=instantkevin]the tranny mount doesn't change when you swap the V6 700r4 for the V8. same location, same crossmember, same tranny mount, same driveshaft. Why are you going with a th350? There is no benefit to it (unless you are building this car the drag track). Gearing is better in 700r4 and gas mileage will be better. No need to change driveshaft, buy adapters, or anything. And you can find them cheap. I got mine for $75 and built it to withstand 450+ horses with less than $400.

P.S. This is a drawing of your brain.
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This is your brain on drugs while trying to draw pictures with text on the internet to prove a point.
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Any questions?



lol, wow you really dont know what your talking about. well heres a little difference for ya. The tail house extensions are the same length between the 700r4 and the THM350 transmissions, but there are absolutely no bolt holes in the 350 that would allow me to bolt up my torque arm bracket, and if there are no holes, than how is it supposed to go on ? well i guess your so smart that ill just leave that question for you and maybe you'll have an answer for me. Also, the transmission mounts ARE different, and because of the torque arm adapter, i will be able to use my old mount. Secondly, I did not say anything about buying a new driveshaft, crossmember, or anything else.

ps. Im talking about installing a THM350 Transmission in a 1988 Camaro rs that used to have a 700r4, with a v6. In case you didnt know, B&M makes a changeover kit for what im doing. I would say you dont know exactly what im talking about. Im not talking about going from a v6 r4 to a v8 r4, Im talking about going from a r4, to a 350. you probably just thought i was going from an r4 to another r4.

no... if you read my post, and actually understood it... you would realize that I was suggesting that you stick with a 700r4. I know you have a TH350, clearly. That's why I said "Why are you going with a TH350?".

I was saying that if you stuck with a 700r4 you wouldn't have to change all that stuff. And clearly you would have to if you put the TH350 in there.

I don't understand how you don't understand what I was suggesting. It's simple english, no tricks.

no... if you read my post, and actually understood it... you would realize that I was suggesting that you stick with a 700r4. I know you have a TH350, clearly. That's why I said "Why are you going with a TH350?".

I was saying that if you stuck with a 700r4 you wouldn't have to change all that stuff. And clearly you would have to if you put the TH350 in there.

I don't understand how you don't understand what I was suggesting. It's simple english, no tricks.


But i cant just stick with my r4 that came outta my v6. I would and that would be great but i cant. Im going with that turbo 350 because thats what came with the motor when i pulled it out of the monte. so both the motor and trans were free to me and i figured i migt as well just keep the 350 instead of fork another 3 or 4 hundred into a tranny. its just a price thing. plus i wanna see what a turbo 350 is actually like. But i do love the r4 and the o/d. I really loved that transmission. It was durable and id recommend it to anybody. sorry for getting roudy. Its just that sometimes no matter where or when, if i feel someone is disrespecting me or trying to directly insult me (like i thought u were trying to do with those comments about my brain bein on drugs and you mocking those pictures i tried to portray on the thread) , I dont react good. I guess it stems from getting a lot of shit said to me when i was younger, and now, i get pissed and hyper really easy when someone is dissin me. Its just years of bein picked on and shit coming out. My bad. but i really hope you werent trying to dis me.

no i wasn't... just tryin to makin life interesting. it's no fun if you can't laugh. the price thing is defintely understandable, money doesn't just fall into your lap.

Can't we all just get along?lol