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Pleas Help On This Issue I Have

M

MEGALADON

1/2 ton status
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Feb 4, 2005
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HOUSTON
I just got a 82 GMC 4x4. it has a 350 trans, the truck came with an overdrive.
I have a 700r-4 from a 91 camaro rs, I want to put in. ALLMOST MOST 4x4
shops here in houston wont give me info I need to make the swap. some folks
have said i need a different output shaft and adapter, some say i just need
the output shaft without the adapter. Being that this is a real 4X4 website,
will someone please give me the real info I need, or what I need to do. :(
thanks
 
I believe you need to either have an adapter made , and have a shorter rear driveshaft and longer front driveshaft made , and make crossmembers up .

Or you just have a shorter 4x4 output shaft put in the transmission .

Easiest to sell the camaro tranny and pick another up used :k5: :k5:
 
I thought the same also, but why do all that if it had an overdrive before.
the only thing I see different is the 350 is shorter than the R-4, the 350
has a thick adapter plate between the trans and tranfer case, I am thinking
I can put the correct outputshaft on the R-4 and delete the adapter. No
need to relocate anything. I am just not sure If I do need a adapter or
spacer between the trans and transfer case for the r-4. I hope someone
with a overdrive on their truck can look at their's or point me in the right
direction, maybe with a company that does this kind of work.
 
I think I understand what you are saying...the truck ORIGINALLY had a 700R4. Someone blew that up (likely) and instead of putting another 700R4, converted it to a TH350. The TH350 conversion requires an adapter plate to make up the length difference between the two trannies so the t-case isn't messed with.

The ONLY issue is how far the output shaft sticks out of the transmission. Someone will have to answer for you whether or not the 700R4 output shaft length was different on 2WD and 4WD apps. If it is the same, then there should be no reason you can't just pull the adapter and bolt the 700R4 in.

Worst case would be replacing output shaft with 4WD one I imagine.
 
Advance Adaptors sells the new output shaft that you need for the 700r4 its a shorter shaft that allows you to use the 350 mounting plate for the t-case which for me was a 203. ORD sells them also mine was like $150. The guy who originally built my 700r4 which was two wheel drive charged me like $60 to put in the new shaft, well worth it cause I'm trans-illiterate:)
 
look under the truck and see if there is a 2" spacer in between the tranny and tcase adapter. it is most likly alum piece. and when under there what tcase do you have? look for a round tag on beck of unit and see if it says 203-c/205-c/208-c. the 203 and205 are castiron. the 208 is alum. and the 203 is full time unit with realy big alum back end of tcase for rear drive shaft to bolt to yoke.
 
sweetk30 said:
look under the truck and see if there is a 2" spacer in between the tranny and tcase adapter. it is most likly alum piece.
Click to expand...

yes there is :D

If im correct, I should just be able to take that out
and put a different output shaft on the 700 and put it in.
 
yes thay did the swap the correct way. the tranny is spaced from the tcase and no drive shaft mods where done . just change tail shaft and bolt in. but look for the lockup 4 wire plug on left side . need it to work . all linkage is same to 700.
 
tail shaft or outputshaft?
think i'll have any problems with a 454
mated to a 700-R4 it is stock.(the motor)
 
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