get this one then

http://cgi.ebay.com/ebaymotors/HAYDE...spagenameZWDVW

"TRANSMISSION OIL COOLER. MADE BY HAYDEN FOR CLASS A MOTOR HOMES, LARGE TRAVEL TRAILERS, 5TH WHEEL TRAILERS, HEAVY DUTY TOWING. THIS COOLER HAS A STACKED PLATE CONSTRUCTION AND BRAZED ALUMINUM TECHNOLOGY FOR MAXIMUM STRENGTH COOLING EFFICIENCY AND OIL FLOW RATE. GROSS VEHICLE WEIGHT TO 30,000 LBS."

thats more then enough, more like overkill. Run it in parrell with your stock cooler.

a 404 cooled my auto v6 tranny with a stage 2 street/strip VB upgrade not one slip ever. i would assume that would be enough for you too.

thats kinda like what jr's3800 is running... i dont need overkill... probably in the 15,000-20,000 GVW range...

there is no auxilliary cooler with the 4t65e-HD, which is why i need this

Nismo, there hasn't been a stock cooler since 1995 on a Bonneville.

i cant remember which way i want.. themostatically controlled or not?

this one look ok?

OFF TOPIC: Will, how does the Bonneville keep the tranny fluid'* temp low?

edit:
themostatically controlled? i assume you mean the cooler would only pass fluid through when it was 'open', which would be based on temp of the fluid?

i sure wouldn't do that.

the 403 looks fine to me. installation shouldn't be to hard at all...uses long zip ties it'* a sinch to attach.

The cooling fins are on small diameter tubes only on it. It still flows when it'* cold, just not through any passages with cooling fins because the fluid get thinner with heat.

Nismo, the only cooler is a small 4" tube inside the radiator core. Only the SSEi and SSE from 92-95 got an aftermarket remote mounted cooler. This little 'cooler' inside the radiator has very small passages. It'* best to bypass it after a trans failure like Haro had. Mine was completely restricted after my first trans blew to pieces. GM passages are larger than ford or chrysler, but still a potential problem for flow. You should do this as a safety to protect the replacement trans. This is why Haro is wondering about this now (as the ambient temps begin rising is his part of the world).

Thermostatically controlled? YES, not NO. Nismo, this is a totally different application than you're used to. You WANT one. You need to let the fluid reach operating temperature. Too cool is bad.

Mine is a 28000 GVWR cooler:
http://i21.photobucket.com/albums/b251/bcphotos/zz4.jpg
Viscosity (thermo) controlled.

like the one bill posted?