Lucas Transmission fix - Anyone Try This???

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Oct 4, 2004 | 07:23 PM

Motor City Vette

Thread Starter

Safety Car

Joined: Mar 2002

Posts: 4,366

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From: Las Vegas NV

Lucas Transmission fix - Anyone Try This???

Has anyone tried Lucas Transmission Fix (http://www.lucasoil.com/products/dis...tid=2&loc=show)? I have a Muncie 4-speed (1970) and after my car heats up, second gear is sometimes hard to shift into. I'm wondering if this stuff will help.

I'm going to be putting in a heat barrier under the carpet and center console. So, whil I have the center console out, I was could un-screw the shifter-boot and pour this stuff in. What do you think?

Thanks.

Oct 4, 2004 | 07:41 PM

Wrecked82

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Quote:

Originally Posted by Motor City Vette

I have used the power steering stop leak and was dumb-founded at the results. Very heavy leak from a newer control valve stopped leaking and no leaks in the last 20K miles of driving.

Put some in a Grand Cherokee that had a groaning power steering and it stopped in about 1000 miles of driving.

Have used differential fluid additive and like the results.

Oct 6, 2004 | 05:18 PM

ZD75blue

Race Director

Joined: Nov 2000

Posts: 16,416

Likes: 1

From: NC,USA

I've tried their auto version of the tranny fix...

Worked well... Started out with some front wheel drive 80's gm. Smoothed it out in the shop!

Oct 6, 2004 | 05:20 PM

i885744

Pro

Joined: Apr 2004

Posts: 687

Likes: 0

From: Atascadero Ca

also tried and loved the automatic transmission fix. Added a bottle to my 89 new yorker about 10k ago and its still shifting perfectly.

Oct 6, 2004 | 05:27 PM

Fevre

Race Director

Joined: Mar 2001

Posts: 11,322

Likes: 1

From: Living in the Hartland

Quote:

Originally Posted by Motor City Vette

So, whil I have the center console out, I was could un-screw the shifter-boot and pour this stuff in. What do you think?

Thanks.

Muncies do not have an integrated shifter rail so there is no access to the trans from the shifter, you have to pour it in through the upper plug on the right (think that is the side) side of the trans.

BTW the t-5 I am installing has the int shift rail and I will be pouring my tranny fluid in from there.

Oct 6, 2004 | 09:44 PM

C8H18

Pro

Joined: Jan 2004

Posts: 653

Likes: 56

From: TX

Quote:

Originally Posted by Motor City Vette

My opinion is to use a quality gear oil in the first place. GM specs GL5 for the transmission. I personally feel that in the long run a GL4 is better for the synchros (which is the problem you described). Perhaps the best compromise is to use a gear oil of the proper weight that meets GM's GL5 but offers GL4 protection to protect the synchros from potential GL5 induced corrosion.

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