LS1121

iTrader: (17)

So my 20 year old 344,000 mile Faithful 1998 Camaro Z28 is going in next week for a rear main seal replacement and A4 4L60E rebuild. I've been reading for hours here this morning on aftermarket trans coolers. I'm seeking some experienced opinions. This is a DD and nothing else so do I really need a cooler? I have a concern about this 20 year old radiator destroying my soon to be Newly rebuilt upgraded Transmission. If I do not really need a cooler then I've been looking at a new radiator, ranging in price from $85 to $300 and let that cool the trans. If it is a real good thing to have a cooler and just disconnect the Trans from the radiator I've been eyeing up this little unit. What do you think?

https://www.ebay.com/itm/Tru-Cool-45...53.m1438.l2649

Cajun ELESS-ONE

id do the cooler. if you are dropping the money for a rebuild, then add the cooler. if the radiator is working fine, just leave it and bypass the internal "cooler" its more of a temperature regulator. keeping the trans fluid around the same temp as the coolant.

LS1121

iTrader: (17)

OK so if I install this cooler in front of my A/C Condensor as a stand alone do I need some type of temp. sensor to keep an eye on my Trans. Temp?

01ssreda4

iTrader: (96)

70264 has everything you need. Mount it in front of the condenser.

LS1121

iTrader: (17)

This will replace my cooler in the radiator?

mrvedit

Yes, the recommended 70264 will replace the cooler in the radiator and is the better option.

While you are thinking of instead installing a new radiator, I recall a post where the OP installed a brand new cheapo $125 radiator and its internal trans cooler failed within a month and ruined the new trans. So if you do chose a new radiator (no one is recommending that), at least get an OEM quality one.

98CayenneT/A

Bypass the "cooler" in the radiator.
Here is a parts list if you want a nice setup.

LS1121

iTrader: (17)

I wasn't sure of which way to go but you guy's have answered my question. Will go with the B&M, thanx to all!

Do I need to install a guage?

01ssreda4

iTrader: (96)

You can, or an OBD scan tool can pull the reading from the computer, it already has a sensor in the valvebody. Ive found transmission temps to be predictable based on 2 things, driving style/condition and ambient air temp. If you log stop and go in the summer that will be about the max your trans will see. If it is acceptable, then your cooling system is sufficient.

If you wanna convert over to AN lines and stuff there are better coolers out there then 70264 due to it having barbed not threaded fittings. For your application, use the 264, and it has supplied adapters already in the package that let you connect and extend the stock lines. Its a complete kit. If for some reason you decide to mount it out of the direct airflow path buy a cheap ebay fan and wire it to the cooler.

LS1121

iTrader: (17)

I have Torque on my cell, found it now to see if it works.

01ssreda4

iTrader: (96)

Ok Im not super familiar with the 98 stuff (only tuned one). I know 99s and up have it.

LS1121

iTrader: (17)

OK so I loaded up the gauge and sitting in the garage engine at 201 my Trans Temp reads 86, I'll take it for a ride later and see how it does. I'm going to buy the B&M you suggested and mount it in front of the A/C, haven't looked yet but last time I was in there I don't remember there being a lot of room. I was going to run a gauge from the inspection line, where the bolt is but from what I've read here my info on Torque comes from a sender on or near the valve body so I guess it's the same difference. I really appreciate all you guy's Help, my forte is not automatic transmissions.
I try to tell people that being Nice is Free.

forcd ind

iTrader: (7)

Just my opinion, but if its been ok up to this point, I would leave it alone-certainly a cooler is a good idea, if you do use one get the Teflon braided hose, a little tricky putting the ends on, but better than the rubber stuff.

sschoeffler

iTrader: (24)

I ran mine at the back of the car. B&M 70298 Transmission temps are good. Its mounted kinda under the electrical bulkhead on the drivers side behind the back seat exterior of vehicle. Ive got the MWC fab 9" still fits. Build some brackets to elevate it off the metal about an inch to provide adequate cooler flow. Fan is a puller fan. Works great!

LS1121

iTrader: (17)

I'm not quite sure what you are trying to say but.... my original OEM radiator has 344,000 miles on it. Are you saying I should stick with that?

mrvedit

We just had another post where the OP's rubber hose clamp for the trans cooling lines failed, ruining the transmission.
https://ls1tech.com/forums/automatic...2-3-shift.html

There are plenty of sad stories here about rubber cooling lines failing.
Hence the strong suggestion to use AN lines and especially Teflon AN lines which have advantages, including that their smaller outside diameter makes then easier to route.

DANOZ28

iTrader: (1)

a cooler is good insurance but another idea is an aluminum trans pan. helps cool trans fluid & holds more. just a thought.

MaroonMonsterLS1

I've heard this alot, and the pan can help. But cast aluminum deep pans have come through my shop multiple times...cracked

If you have a lowered car, and get a cast aluminum deep pan...any clearance issue between that pan and the ground calls for a huge crack, all the fluid dumped, and a smoked trans if you don't catch it in time.

I personally prefer a stock GM deep pan with drain plug, and just an adequately sized cooler. Anybody should be able to find a cooler adequate for whatever they're doing and the aluminum pan is often ridiculously overpriced compared to a steel pan.

06GR

I replaced my stock pan with this - no issues https://www.summitracing.com/parts/r...xoCjmMQAvD_BwE

As far as cooler, I'm running the B&M 70266 with 6AN lines, in series with my radiator cooler. I used the stock hot side metal line to the radiator, the out of the radiator is a 6AN to the B&M. Then I cut the cool side line and put a compression AN fitting and ran a AN line from the B&M to the cut metal line.

Metalchipper

Yup that was me.
My next mod is going to be better cooler lines. I did reroute the lines to go from the tranny- to the stock radiator cooler - to the extra cooler in front of the radiator with a remote bypass valve. When I originally had it plumbed this way the tranny would not warm up in the cold North Dakota winters but now with a higher stall converter I will need better cooling. For the 175 miles that i driven it the remote bypass works well, we will see when it gets summer time hot!