Thread: Auto to manual

Why? Why? Why? Why? Why?

Only need to post the question once. A moderator will probably be nuking the dupicate posts soon.

Tbh its not worth it to bolt a manual up to a 3.1 imo.

Find a different car if you want a manual.

After you research all the parts needed and all the man hours on custom making alot of this install you'll be in soooooo deep that you could bought a rwd manual car already.

I also was curious. I did some searching and there are lot's of design issues. There are PCM programming, clutch mechanics, and others. I could have misunderstood, but there has not been any FWD Grand Prix that were Manual. If that is true then you are in for some major fabrications. When I was a teenager my friend and I switch out his automatic for a 4 speed in his 67 mustang. But think about it, the car was designed for either option. That meant there were brackets, consoles, levers, holes in the firewall, and such. That not even thinking about computers these days. If I was contemplating this project my first question is has there ever been a FWD Grand Prix with a Manual transmission? If the answer is no, then there can be no donor car.

Now, if I had the shop space, I wonder if you could put a Grand Prix body on a rear wheel drive frame. Smoke off the back wheels of a Grand Prix .... Oh well that is another thread. :-)


I found this company who make transverse Manule Transmisions.
http://www.getrag.com/en/218.1?crite...sse=0&x=21&y=9
Their largest query was 400nm and above. If I converted right that around 295 ft lb. My stock 06 GT is about 280 ft lb @ 5,500 rpm

This was cool. It broke down what the letters meant. List of GM transmissions - Wikipedia, the free encyclopedia
<Snipt>
Today, GM uses a simple naming scheme for their transmissions, with the "Hydra-Matic" name used on most automatics across all divisions.

3/4/5/6	L/T	##	-E
Number of forward gears	L=Longitudinal T=Transverse	GVWR rating	"E" for Electronic "HD" for Heavy Duty

First-generation transverse (Front Wheel drive)

• 1995–2010 4T40-E/4T45-E — 4-speed light-duty (used in smaller front wheel drive GM vehicles)
• 1991–2010 4T60-E/4T65-E/4T65E-HD — 4-speed medium-duty (used in larger front wheel drive GM vehicles)
• 1993–2010 4T80-E — 4-speed heavy-duty (used in large front wheel drive GM vehicles, only with Cadillac NorthStar V8.

Second-generation transverse (Front Wheel drive)

• 2008– 6T30/6T40/6T45 — 6-speed light-duty
• 2006– 6T70/6T75 — 6-speed medium-duty

Here are the threads that I gleaned some of the issues from.
standard transmission for grand prix? - Motor Trend Motor Trend Garage Forum
Pontiac Grand Prix Questions - Are there any manual transmissions that will mount up to a 3800 Series... - CarGurus

There were 5 speed 1st gen wbody GP's. I believe they were the getrag 282 and only came mated to a 3100.

Here is the "Getrag" wkipidea. Getrag - Wikipedia, the free encyclopedia
They did not list the Grand Prix under the 282 and I did not find anything on the "Getrag" web site. They could have missed the Grand Prix when the there listing it, or maybe not, as we all know you can't put anything on the internet that is not true. :-)

<snipt>
282 — 5-speedBuick Skyhawk, Chevrolet Cavalier, Chevrolet Beretta, Chevrolet Celebrity, Oldsmobile Achieva, Oldsmobile Cutlass Supreme, Oldsmobile Cutlass Calais, Pontiac 6000, Pontiac Fiero, Pontiac Sunbird, Pontiac Grand Am
284 — 5-speedChevrolet Lumina, Oldsmobile Cutlass Supreme, Pontiac Grand Prix, Chrysler TC by Maserati (16v only), Chrysler Seled Mexico (Lotus 16v DOHC head)

Originally Posted by matt5112

Two people on here have completed the swap.

Cool, Is there a thread that you know of?

Originally Posted by matt5112

With details? Not on here. Google grand prix getrag 284 swap.

As in a lot of things in life, it's a mater of how you ask the question. :-)
I will post some that I thought interesting for future reference.

This was not a Grand Prix and it was older, but interesting.
Getrag 284 Swap Complete Parts List

This thread is kind of long, but some interesting discussions on a bunch of different kinds of FWD.
89 Grand Prix 3.1 turbo 5 speed swap- see 1st post for updated pics

What Matt posted is the Google search key.

A list of manuals in cars that will bolt up? Whatever was put into the cavalier 2.2 base model, and the getrag 282 and 284 from the Z34 Lumina.. And I'm not 100% that that G6 F40 6 speed will bolt up, but I heard that's been done before as well...

I always enjoy watching this, sounds good on my 2.1 surround.