CLASS RACER FORUM - View Single Post - Pulling trans from DF/S 91 Olds Delta 88 Help

ss3011 · 12-24-2014, 02:58 PM

A 4T40 might work well, I believe there is a case that will bolt up. Adapters are not legal in stock, unless approved by NHRA. Joel on Joy did the trans for Bill Owens Grand Am, so he has some knowledge of the 4T40. If you still have the original trans in the Olds, it actually has a higher numerical ratio trans, than what the 4T40 has, and uses a similar converter. I don't see much upside in changing the car to install a 4T40.

12-24-2014, 02:58 PM	#9
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Pulling trans from DF/S 91 Olds Delta 88 Help A 4T40 might work well, I believe there is a case that will bolt up. Adapters are not legal in stock, unless approved by NHRA. Joel on Joy did the trans for Bill Owens Grand Am, so he has some knowledge of the 4T40. If you still have the original trans in the Olds, it actually has a higher numerical ratio trans, than what the 4T40 has, and uses a similar converter. I don't see much upside in changing the car to install a 4T40.