Printable Version of Topic

Posted by: Bill Smith Jul 15 2008, 07:44 PM

I ran a DE this past weekend - I was driving alot more aggresive than I have in the past - my 74 yellow 914 has a 3.2 L with a 901 trans with a quaiffe. The trans worked very good - on the track I was using 3,4, and 5th. when they threw the checkered flag - and I came into the pits, I had a hard time getting into 1st and 2nd - after it sat for a while it was fine. I am using synthetic oil in the trans but not using an oil cooler. I didnt check the temp. but know I was running it hard. I was running 1:27 at summit point, WV.

has anyone else experienced this??????????

Posted by: sww914 Jul 15 2008, 08:18 PM

You figured it out, hot tranny. You'll probably need to add a cooler and a pump. You don't necessarily need a whole manifold to direct the gear oil back into the top of the tranny, it can just go back into 1 spot. One of the racecars that I maintain is a 911 with a 2.9 RSRish MFI motor and the tranny cooler pump draws from the drain plug and dumps back into the top. I don't know exactly where, visibility is limited on the top of the tranny and I haven't had to pull the powertrain on this one yet.
Almost everybody will tell you to get that synthetic crap out of your 901 and I agree. Many people use Swepco 201 with good results and I'm one of them.
I've only ever had tranny problems on my car once. That was the one event that I tried Mobil1 synthetic. I dumped it when I got home and put Swepco in it, no problems since.

Posted by: drew365 Jul 15 2008, 08:22 PM

Absolutely. The longer your run group is, the more likely you'll experience this. A transaxle cooler is the next mod for my car if I don't sell it. I find that after about 20 mins. of pushing hard on track the shifting will start to get sloppy and the chance of grabbing 1st on a 4 to 3 downshift goes way up. Also, most racers recommend using only Swepco in the 901 box.

Posted by: Bill Smith Jul 15 2008, 08:40 PM

where do you get swepco 201?

Posted by: drew365 Jul 15 2008, 09:13 PM

Pelican, Performance Products, Paragon. I guess all the suppliers for P cars that start with a P.

Posted by: SirAndy Jul 15 2008, 09:22 PM

yupp, all the time ... i'm considering options for a tranny cooler as we speak ...

and i don't even have a LSD in mine yet ...
Andy

Posted by: grantsfo Jul 15 2008, 11:55 PM

Havent expereined this yet and I push the car fairly hard on 20 to 25 minute sessions.. I do use Swepco and I think I get fairly good cooling effect with no trunk floor. Also have low torque motor.