4L60E shudder- Lucas Red?

[firecadet613]

Well my 95 4L60E thats mated to a 4.3 V6 has some torque converter shudder, anything I can/should do to cure it, fluid or addative wise? I dropped the pan two days ago, changed the filter and seal, added a drain plug to the pan, and refilled with Mobil 1 Synthetic ATF. After hearing it can cause this trans to slip, I drained via the drain plug and refilled with Supertech ATF just now, but the shudder is still there, just moves to different RPM ranges. Any good known fluid or addatives I should try?

Thanks,

Joe

--I've also heard I should put a bottle of lucas red in there to stop it, will it work?

 

[johnicon]

I was just about to drain and fill my GMC Envoy tranny with Mobil 1. This ATF really causes slipping? It's marked as being a Dextron III fluid so why would that be? Where did you hear that from?

BTW, there are additives that bring Mercon fluids up to Mercon V specs, and the Mercon V spec was made to protect against convertor shudder. Maybe one of those additives would help you? **** , I can't remember the name...

 

[unDummy]

Is it shudder or a blown converter/transmission?

Lubegard/lifeautomotive are two companies that make fluid bandaids. If either don't work, start saving for an overhaul/upgrade.

 

[timish]

Hi,

I don't believe Mobil 1 causes slipping in these lines of auto trans.

I have a 1995 Jaguar XJR equipped with a GM 4L80E transmisison, and I flushed out the trans and refilled with Mobil 1 Synth ATF over 10,000 miles ago.

My car puts out 330HP/378ft/lbs of torque and I have no transmission issues whatsoever.

Tim

 

[firecadet613]

Trans/converter isn't shot, only 70K miles on it and fluid came out ok. Check out LS1.com and a few other sites and you'll see that Mobil 1 isn't good in any GM Hydramatic tranny, which the 4l60/80e are.

Joe

 

[JohnBrowning]

M1 will not hurt any transmission reguireing Dex-III fluid. What hurts GM transmissions is poor material selection and stupid service intervals. This is especial true in a truck and in a sports car. Trany fluids should be drained and refilled ever 30,000 miles max and filter changed!

Any brand that has a registered (lisceensed)trade mark on it has to meet the manufactures spec.'s in order to use the lisceensed trade mark.

If you were going to get slipage from a fluid it would be obvious right away. Shudder is usualy caused by bad converter, TCC switch , TCC apply solanoid . Their can be other culprits but these are the main offenders. THe possably exception would be running the wrong fluid in it.

I think you tossed good trany fluid and money down the drain buy draining out the M1. FOr about $75 any good GM dealer ship should be able to tell you what is wrong. They can plug the gameboy in cycle the TC at various speeds to see if it is TC or a solinoid. Then they will take line pressures and check solnoids with batery.

 

[robert]

Local auto show on radio recommends trying a complete flush when you have a shudder. This may solve problem if torque converter has not gone to far.