TH350 TO 700 CONVERSION - NJFBOA - Home of New Jersey's Camaros and Firebirds

chrisfrom nj · 02-13-2006, 12:51 AM

I HAVE A 1980 CAMARO WITH A BLOWN TRANS I HAVE A TRANS OUT OF A 91 FIREBIRD V8 THAT I WANT TO PUT IN DOES ANYONE KNOW IF THE TRANS CROSSMEMBER FOR A TH350 AND A 700 ARE THE SAME AND ALLSO DO I NEED TO SHORTEN THE DRIVESHAFT THE 80 CAMARO WAS ORIGIONALLY A 4 SPEED CAR I BOUGHT IT FROM THE JUNKYARD WITH A BLOWN MOTOR AND A TH350 TRANS I CHANGED THE MOTOR AND BLEW THE TRANS THE SECOND DAY I HAD IT ON THE ROAD

V · 02-13-2006, 12:58 AM

I do believe the trans mount is in a different place so the crossmember would need to be modified since I dont think any 2nd gen had a stock crossmember that would fit the 700r4. The driveshaft is a different length, I believe the th-350 one would need to be shortened. Also you would need a new shifter since the th350 is a 3 speed and the 700r4 has overdrive, plus then if you want to retain the 4th gear lockup function, you'd need a special wiring setup with a switch. Its almost more work and money than its worth to do the swap. I would recommend just buying another TH-350 and keep that.

JL8Jeff · 02-13-2006, 07:47 AM

I'm pretty sure you need a new crossmember and driveshaft. The TH200R4 is the same length as the TH350 so you might consider that instead. The Buick GN's run the T200 so no problem with getting one built. Check www.bowtieoverdrives.com for more info on the 700R4.

84HOtransam · 02-13-2006, 01:55 PM

Quote:

Originally Posted by chrisfrom nj

I HAVE A 1980 CAMARO WITH A BLOWN TRANS I HAVE A TRANS OUT OF A 91 FIREBIRD V8 THAT I WANT TO PUT IN DOES ANYONE KNOW IF THE TRANS CROSSMEMBER FOR A TH350 AND A 700 ARE THE SAME AND ALLSO DO I NEED TO SHORTEN THE DRIVESHAFT THE 80 CAMARO WAS ORIGIONALLY A 4 SPEED CAR I BOUGHT IT FROM THE JUNKYARD WITH A BLOWN MOTOR AND A TH350 TRANS I CHANGED THE MOTOR AND BLEW THE TRANS THE SECOND DAY I HAD IT ON THE ROAD

78 camaro has a th350 trans for sale 75 bucks..its in good shape and would cost less then getting the driveshaft cut and all.

NJSPEEDER · 02-13-2006, 03:31 PM

swapping in an overdrive isn't a very big deal. you can reuse your stock speedo cable, you will need to make sure the speedo gears in the 700r4 are correct since i don't think they interchange, the 700 has a slightly longer mounting length(i think it is only like 1inch different) so you can easily modify the stock cross member to work, and the drive shaft has so be shortened by a few inches.

chrisfrom nj · 02-13-2006, 04:27 PM

thanks alot for all your help i should buy the th 350 trans off 78 camaro instead of doing alot of modification i'll keep the 700 trans and the 305 motor to put in a 88 blazer the motor in the blazer its a blown 2.8 v6 i want to start that project soon so i can be ready for next years snow storm

JL8Jeff · 02-13-2006, 05:15 PM

That's a good idea. I also have a TH350 trans if you're interested but it's been sitting for at least 10 years so I would think it needs new seals at the least.

V · 02-13-2006, 05:23 PM

i also got 2 th350s for sale, 100 each

chrisfrom nj · 02-13-2006, 05:42 PM

send me private messages with your adresses and phone numbers