 hot transmission in DE |
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| Bill Smith |
 Jul 15 2008, 07:44 PM
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#1
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Member  Group: Members Posts: 169 Joined: 2-May 06 From: Keyser, WV Member No.: 5,964  |
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?????????? |
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| sww914 |
Jul 15 2008, 08:18 PM
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#2
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Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
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. |
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| drew365 |
Jul 15 2008, 08:22 PM
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#3
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These are the good old days! Group: Members Posts: 2,004 Joined: 29-December 02 From: Sunny So. Cal. Member No.: 37 |
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.
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| Bill Smith |
Jul 15 2008, 08:40 PM
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#4
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Member Group: Members Posts: 169 Joined: 2-May 06 From: Keyser, WV Member No.: 5,964 |
where do you get swepco 201?
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| drew365 |
Jul 15 2008, 09:13 PM
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#5
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These are the good old days! Group: Members Posts: 2,004 Joined: 29-December 02 From: Sunny So. Cal. Member No.: 37 |
Pelican, Performance Products, Paragon. I guess all the suppliers for P cars that start with a P.
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| SirAndy |
Jul 15 2008, 09:22 PM
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#6
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Resident German Group: Admin Posts: 41,623 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Bill Smith @ Jul 15 2008, 05:44 PM)  has anyone else experienced this?????????? 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 ... (IMG:style_emoticons/default/rolleyes.gif) Andy |
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| grantsfo |
Jul 15 2008, 11:55 PM
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#7
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Arrrrhhhh! Group: Members Posts: 4,327 Joined: 16-March 03 Member No.: 433 Region Association: None |
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.
This post has been edited by grantsfo: Jul 15 2008, 11:56 PM |
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