3.6L + 901 transaxle?, Is this a recipe for disaster? |
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3.6L + 901 transaxle?, Is this a recipe for disaster? |
Hydra. |
Sep 18 2012, 12:11 PM
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Member Group: Members Posts: 59 Joined: 23-July 05 From: www.hydraperformance.com Member No.: 4,457 Region Association: None |
I'm seriously contemplating going with a 3.6L 964 motor for my 914, but I'd like to keep the existing 901 transaxle. I understand that this doesn't leave much in the way of a safety factor, but what can be done to suitably strengthen the 901? Is it absolutely necessary to lock out 1st gear, or would something like an Albins 2.400 1st gear, along with a billet sideplate help out? I understand the alternative is to go with a 915-based setup, but if a 901 can be made to work satisfactorily then I would rather do that...
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PRS914-6 |
Sep 22 2012, 09:25 AM
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#2
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
This subject comes up pretty frequently and gets pretty much the same replies. I'll add my perspective though.
If you are tight on money, run the 901 and be easy on first. Personally, I wouldn't delete it since it's a nice crawl along in traffic gear. However, if you stand on it in first you might walk home. I made the decision to run a 915 for one main reason. I refused to have the power of a 3.6 with a gearbox totally inappropriately geared for the engine. That means re-gearing and I certainly wasn't going to spend the money to rebuild and re-gear a 901 tranny that was not up to the task of running all 5 gears or the power of a 3.6. Personally, I'd rather pour the money in a better tranny. I would feel differently if I wasn't going to re-gear. I re-geared my 915. 1-4 is close ratio with first starting higher than a 901 first but lower than a 901 second. First is good for 53 mph. For 5th I took a 915 7:31 5th gear and installed it in my 8:31 tranny. WEVO said it would not fit in their rear case but my grinder fixed that issue. What I have now is a really fun gearbox that takes me long past 100mph and a 5th gear that cruises at 80mph at 3000 rpm. It is NOT race gearing but you can easily chat with your passenger on the freeway at speed. I also added a Guard TB posi Installing billet side covers is a waste of money since the torque is pushing on the case side and NOT on the cover side. To say the least, this conversion is not for the financially strapped car builder so beware. I ended up with about $7500 total to do mine including the WEVO conversion. Here is the gearing I am running....disregard the note that says 901 gearing as installed |
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