I will be pulling a trailer around this summer that weighs about 2000lbs loaded with my 92 4.0 auto tranny on 31s. The radiator has a built in cooler, but is it enough? If not, I've seen some suggestions to use the at the link below. for those of you who have installed this, did you bypass the built in cooler? Thanks for you help.






http://www.seriousoffroadproducts.co...formance-70268

you wont regret installing a trans kooler. anything bigger than stock tires id say its a must. and buy the biggest one you can fit that you feel comfy with.

as far as by passing the in-radiator cooler it really just depends on your climate. if it cold where you are, keep it, it helps get the tranny fluid up to op temp. on those really cold days. but if it never dip below 30 just by pass it. i didnt with mine but i probly should have (im in south texas)

I did the same thing because of slow going on the trails I ride in the National Forest. Hot and humid in the summer and very rough trails in 4w drive also added another radiator fan.

I did keep the OEM cooler for the trans also and added a temp gauge for it also.

i agree if its cold climate when you drive it keep the stock cooler and add to it. considering you live in Colorado i would recommend keeping it to make sure the trans fluid warms up in a proper manner

I just put the B&M 70264 in mine. It's 14,400 BTU and fit nicely. I'm running 35" tires. Current tranny temps with cooler installed range from 160-180, hasn't gone any higher yet. Get one, you won't regret it and its pretty cheap insurance for your tranny.

I also did not bypass the stock cooler as the temp where I live drops to the single digits.

I installed the hayden hd trans cooler from oriley's on my 97. I did by pass the cooler as my factory crimp sections were leaking anyways. It is a huge difference in the way my trans. shifts and feels. I would recomend it. I agree with these guys if it gets cold where you live I would not bypass it. But if you do you can always just sit in the jeep for a couple minutes in drive or reverse befor you leave on cold mornings.

I spoke with B&M this morning and they suggested leaving the stock cooler in line also. This winter there were many days where it did not get above freezing so I think leaving the cooler in line probably would be a good idea. Ok so which line is the supply line on the radiator? Did you all put it before or after the stock cooler?

IIRC. The supply is the top line and you will want to put it after the stock cooler.

I read somewhere that someone suggested mounting it in front of the radiator instead of on it stating that the stand off would allow cool air to mix. Would setting it off of the radiator disrupt air flow, or not allow the fan to pull air through? ....too many thoughts....head hurts. I suppose I should get to work.


Second thought. Mounting it on the passenger side would be best on the radiator would allow the fan to always be pulling air through it since I still have the stock fan.

How far are you planning to stand it off? I wouldnt think it would matter to much as your a/c condensor is at least a 1/2" away from the radiator stock.

My hayden kit came with foam pads that were about 1/4" thick and plastic pins run through the rad. to hold the cooler to it.

Correct on both points.
Not a good idea to mount directly on the condenser or radiator. This will likely hinder airflow and absorb or conduct heat to the condenser/radiator.
I placed mine in front of the mechanical fan. Others put it in front of the aux fan and use an override switch.
I use a ZJ fan clutch which flows more air, especially at slower speeds and at idle.

I have mine mounted below the radiator behind the bumper on the passenger side.

A number of people have mounted it there and it seems to work good..
My reasoning to mount the largest plate&fin cooler to fit in front of the mechanical fan was slow speed/high RPM driving in soft sand.
Deep sand driving is especially tough.

Mounting a trans cooler was one of the better upgrades I've made. I also installed a gauge and am inline screw on filter. The AW4 doesn't actually have a real filter. Only a screen. Every little bit helps.