Hello all

I have found a good deal for a replacement Trans for my LNF

It is a 4.45 Final Drive GM Race trans

The unit is brand new but the seller doesnt know a lot about it

Anyone have any info about it

So far he knows that it has the Quaife and upgraded Syncros

 

Buy it, that's the trans ZZP is running at the track. It shifts the high load areas to 4th instead of 3rd in the middle of the shaft, 4th is near the end of the shaft so it won't self destruct as easy.

 

I am buying it

Just wanted to know some info about it at all

How to do you tell it has the Quaife by the Serial Tag?

 

I think it has LSD right on the barcode tag.

 

How does he know that it has upgraded synchros? If he doesn't know much about it, I would be leery as all get out. I don't know if GM even made an LNF race trans. The 4.45 FD is from an LSJ, if I remember correctly, which takes alot of stress off third gear, and is indeed the same FD that ZZP runs. It works well in the 1/4 with our gear ratios, as ZZP has proven.

I would get WAY more info. Get the tag code, and have a dealer look it up. I jsut don't trust sellers that claim its something special, but don't know much about it. Ya know?

 

This man speaks the truth. The 4.45 FD is from the LSJ.

 

My guess is... its an LSJ, LSD trans. But, I would have to check the VIN # on the trans.

Hell if its truly a race trans, it won't have a VIN... FYI... race cars don't have VINS.

 

The guy selling this rebuilds trans units also

He is taking mine as a core

This 4.45 im getting is a new unit

Pic of the case



Pic of the Code tag





Anyone have any info on the background of these trans? I looked up the Part number on partsdirect and it comes up as a MU1 trans?

What fluid is best in these?

 

I don't think MU1 is correct. Everything I pull up about it says the MU1 trans was from the mid 90's. The 'M' codes refer to the gear ratios used, like the typical Cobalt F35 is an MU3 gear set.

Also, concerning it being new or not... its new, I didn't doubt that. Just saying its likely an LSJ trans.

Remember, GM didn't have any LNF powered race Cobalts (that most people know about).

 

I realize that about the LSJ

I just called it a LNF race trans cause thats the car its going to go into

Can you tell me anything about this trans ? That code tell you anything?

 

I don't have any resources at the moment beyond Google. Call Tom at Crate Engine Depot, he might be able to give you a hand, or at least point you to someone that could.

 

LSJ tran uses a special order / dealer only Saturn fluid.


21088899

 

According to the newest trans fluid thread you can also use the lnf fluid as it is a newer/better fluid.

https://www.cobaltss.net/forums/driv...thread-230048/

 

The LNF fluid is 90 bucks for 2 bottles here in Canada

Never heard of that Saturn crap either

What are the specs on the oil?

I remember this from the F23 trans that turned out to be ATF

 

You really should use the GM stuff. Its a no service trans, and the fluid is supposed to last about 100k miles. I used Redline 75-90 in my trans, and it held up just fine. I know some people will argue against it, but I saw no adverse effects, first hand, though, I did change the fluid every year to keep it fresh.

 

Red Line has a new MT-85 that is a 75w-85 GL-4 fluid. Specs look pretty close to Castrol Syntrans, the LNF fluid. Shifts fine, syncros engage fine and it's ~$13/qt. I change mine annually also, Matt.

 

Found out more about this Trans

The shop that has this trans in Southern Ontario made these for the Grand Am Cobalt race cars

This is the last new one

 

LSJ is not 4.45. LSJ is 4.05, LNF is 3.82

 

Well then! I say pick it up!

 

Looks like you found a keeper

 

Yup hopefully everything works out

Pulling mine this Saturday and hopefully getting this on Sunday

 

haha it's one of Qwik's, def pick it up!

 

came out of GBM or GS racing in Ontario.

looks like this


works good.
were LNF units re-built up for/by GMR for Koni cars....4.45.
that ratio is also found in a vue trans that can mate up to an LE5 car...
also found in this car...

 

Trans is installed and it's nice to run the car again

 

Glad you got it going, how do you like the 4.45 gear?