Using a 901 w/3.2-Any Problems? Options

[ellisor3]

I am about to install my 3.2 engine and it is being paired with the 901. I was wondering if the 901 need to be regeared or use heavier gears for this application or is the standard gearing fine?

Any other things that should be considered?

It will be for street only.

[pcar916]

(IMG:style_emoticons/default/agree.gif) A cooler is essential as far as I'm concerned, in the south. Even on a street car and especially with limited slip.

If these boxes had coolers and pumps in them from the factory, other than obvious driver abuse like speed shifting (hell on spiders and sliders), they would last longer.

And for those who run synthetic gear lube (a controversial topic at best) temps will come down even farther.
Everything's better cool!

[ellisor3]

(IMG:style_emoticons/default/agree.gif) A cooler is essential as far as I'm concerned, in the south. Even on a street car and especially with limited slip.

If these boxes had coolers and pumps in them from the factory, other than obvious driver abuse like speed shifting (hell on spiders and sliders), they would last longer.

Where would you mount it?

[pcar916]

Where would you mount it?

There is plenty of space back there but exhaust heat makes that a sticky wicket. Some have mounted it in and under their rear trunks and are fan-cooled, while others have them mounted behind the transmission and between the twin exhausts. Note: If you have a stock exhaust that rear mount space is taken.

Cool air can be gotten from wherever you can find it and ducted into the cooler. Sometimes that's the rear wheelwell, sometimes its a naca-duct or scoop in the rocker covers, or a scoop mounted somewhere else. Just remember, naca ducts aren't designed to give you a whole bunch of air. If your temps are too high then a fan is needed.

Let's talk about what components you need to use and some examples...

Pump: Weldon (high dollar), Tilton, Mocal. A reversible pump will allow you to run it backwards and drain the transaxle without opening a drain plug

http://www.weldonracing.com/product/54-7/9...e_Oil_Pump.html

http://www.racerpartswholesale.com/categor...ial_Cooler_Pump

Filter: Canton Mecca, other. High-flow filter with replaceable cartridge. Makes it easy to see how much metal you're rubbing off and protects your pump and cooler.

Cooler: B&S, Earls, other.

Hose and fittings: Aeroquip, Earl's, or high temp rubber and brass fittings. The latter are higher maintenance but cheaper. I recommend -8AN stuff. Good flow and it'll tolerate heat better, especially when wrapped.

Check valve: Canton Mecca, other. So the flow can't back into the case. Needed if the cooler etc. is mounted higher than the transaxle... normally the case.

Machine work: At least the inlet will have to be tapped into your case. For the outlet you can use the drain plug hole and a (non-magnetic) 915 plug tapped for a fitting (in my case a -8). The 915 plugs are a hex's and "outties" rather than the "innie" plugs 901 and 914 cases have.

Overflow canister: might not need this but it has to be vented and the outlet fitting will go where the current vent is in teh top of your case.

Non-useful (for most of us) note: Some factory 915's have the finned cooler-loops sticking out of the passenger side of the transmission and is a coil-looking affair. But it has an internal pump too. Since it's under the diff fluid level it doesn't need a check valve.

Good luck