So ive decided to install a transmission cooler but i just have some questions. should install it so it goes through the cooler in the radiator and then through the after market cooler or the other way around or just through the aftermarket cooler and.. which line is the return line..on top of the radiator or on the bottom end of the rad. ???


1990 Pontiac Bonneville SSE

Why?

All these things depend on which cooler you get, what your goals are and what you have available.

There are coolers that self regulate temps, some are merely add ons. If you are looking to merely bring the temps down a bit..I'd say add on. However if you bypass the radiator then you can keep the trans much cooler in the summer..warm up in the winter will be slower without the coolant temps to preheat it.

We really need to know what issues you're having with the trans right now, how many miles, condition, etc. And what your mod plans are with the car. If it'* staying mostly stock, stay stock or install a small cooler. What'* your climate, summer temps, etc? Planning on towing?

What prompted you to go this direction? Lots of factors.

I was going to add one, Then my cooler linestarted to leak, "I was like I have one". So I left it alone, I talked to out transmission man here he says." Factory is more and going to cover my *** when I turbo". So I would offer the same advise to you.

Mike, we need to know what MODEL you have. What engine? Please put that in your signature.

The Series 1 Supercharged cars and some non-supercharged cars got auxiliary trans coolers from the factory. The 'cooler' in your radiator isn't really a cooler.

When you go Turbo, the factory cooler (even the external cooler) will NOT be sufficient to protect your trans.

[quote="willwren"]Mike, we need to know what MODEL you have. What engine? Please put that in your signature.

The Series 1 Supercharged cars and some non-supercharged cars got auxiliary trans coolers from the factory. The 'cooler' in your radiator isn't really a cooler.

When you go Turbo, the factory cooler (even the external cooler) will NOT be sufficient to protect your trans.[/qu
Completed but donot want to jack this thread I can do my own later

When did you swap motors? Vin K didn't start until 1995.

Ok had to look backon a thread I have L motor...

ok well i plan on towing a small trailer for like atvs and a dirt bike and a small boat its only like a ten foot long v- bottom its real light but i still would like to have a trans cooler for the hot summers when i drive three hours to my cabin and just to be on the safe side