I was going through some postings on Trannies and this question came to mind. Will I need an adapter to attach a stock 86 V6 to my 88 Getrag Transmission that had a quad 4 on it? My thinking is yes, and where would I get one?
Get a transmission shop to change the bellhousing half of the Quad-4 Getrag transmisson. You'll need the bellhousing from a V6 Getrag (but then you'd already have a V6 tranny anyway?) (these are circa 1992 Getrag trannys)
To clear things up, I have two cars an 86 SE V6 automatic and the 88 Quad 4, 5 speed. I am doing a total restoration on the 88 and plan on using the V6 engine. So what I understand, is that I can use the bell housing off the automatic tranny and swap it out to the 5 speed tranny. Will I also need to get an ECM with a Manuel transmission chip?
Thanks for all the replies, this is a great site with a lot of information.
I have the original stock 88 4 cylinder 90 hp... Just went to a local salvage yard at noon, looked at a LD9 2.4L Twin cam in a 2001 Grand Am. It was still in the car with all the harness. I have a lot to do before I am ready to install an engine, so I have the time to explore my options.
I bolted an 88 Isuzu (from a 4 cylinder) to a 3.4. (Nearly identical block to your 2.8.) It worked fine, but I didn't shock load it. (No clutch drops or speed shifting.)
You will need an 85-87 V6 flywheel, due to the way your 86 V6 is balanced.
Buy an 87-88 V6 clutch, but use the Isuzu release bearing. (I specified 87-88 because they are both 5 speeds. I had an 88 5 speed clutch. I know that at least that one will work. I've heard of at least one person having difficulties using the 4 speed clutch with an Isuzu. YMMV.)
Your 4 cylinder clutch will also work, but it is probably smaller in diameter than the V6 clutch, and will likely wear out more quickly.
------------------ Raydar 88 Formula IMSA Fastback. 4.9, NVG T550