can I change out the overdrive tranny for a 350 or 400 turbo tranny

1988 GMC SIERRA
30,000 MILES
Avatar
SCOTT CARVER
  • MEMBER
  • 2 POSTS
I have an 88 GMC Serra 4x4 with 350, overdrive tranny. I am noticing a hard shift between 2nd and 3rd and not much power. I am wondering if I can change the overdrive tranny out for a 350 or 400 turbo tranny and if I can do I have to change out the transfer case.
Jul 26, 2012 at 4:37 PM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
would you be going to 2 wheel drive or staying in 4 wheel??

Roy
Jul 26, 2012 at 4:43 PM
Avatar
SCOTT CARVER
  • MEMBER
  • 2 POSTS
staying 4x4 just want better performance and towing power.
Jul 26, 2012 at 5:46 PM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
350 trans works well and geared well. not sure if the tranfer case will work i know the new process cases work well with the 350. you may have to get diferent driveshafts but you wil know when you fit them up there.

it is not a direct fit. you will have mix and match some parts to get where you want.


Roy
Jul 26, 2012 at 6:25 PM