Tag Archives: Lightweigh Shock Proof

Choose the proper transmission oil for your Toyota transmission

Red Line Oil Logo

First off… There are a few well known shops that continue to fill up the E-series, S-series and C-series with GL-5 oil. This is really really bad for the long term life of your gear box.

Why?
http://www.widman.biz/uploads/Transaxle_oil.pdf
There are not that many oils left that are GL4 only.That is why everyone recommends Redline MT90. It is one of the best and does a really good job of lubricating the Toyota gearboxes.

http://www.redlineoil.com/product.aspx?pid=46&pcid=7

Lightweight Shockproof…
http://www.redlineoil.com/product.aspx?pid=43&pcid=8
Warning – Avoid use with pumps, coolers, and filters as unique medium and affinity for metal can cause clogging.
Designed for wet sump transmissions and differentials with splash lubrication.
The C-series and S-series are splash lube while the E-series is pumped and has a cooler.

Same with Super lightweight shock proof.
http://www.redlineoil.com/product.aspx?pid=42&pcid=8
Avoid use with pumps, coolers, and filters as unique medium and affinity for metal can cause clogging.
Designed for wet sump transmissions and differentials with splash lubrication.

Syncro with GL5 coating

You can see in picture number 1 a MR2 E153 syncro that has used a GL5 oil. It is black. It should be a shiny brass color. As the syncros do their job, that layer is a self sacrificing layer, and as it is pulled off, it pulls a micron of brass from the syncro. That adds up and before long you are having to spend $1000+ on a E153 rebuild. Shops love that.

That layer does have a good side. It makes used up transaxle seem good again. That is why so many unqualified people rave about using the wrong oil in your gearbox. It makes it shift again without grinding. Instead if fixing the original problem, you now have cost yourself even more money as almost everything will need replacing in the gear box.

5th gear E153

Good E153 5th gear syncro. Bright yellow brass. No GL5 coating.

I endurance race a E153 transaxle.

I have tried the GL4/GL5 Lucas 75w90.
It works good. A bit thick in the cold mornings. seems thicker than Redline.

I spoke with Lucas reps at the Charlotte N.C. race car convention in February 2015. They said the following – You CAN’T and SHOULD NOT run the 100% Lucas 75w90 trans oil in the E-Series. Even though it says GL4/GL5, it is NOT designed for our cases for the same reason why you don’t use LWSP. You have to water it down with another Lucas oil, and I am getting their tech folks to get me that info. I’ll pass it on once I find out.

So, bottom line.
The people that make the oils, they have told us what to use, and what not to use. They say DO NOT use 100% GL5 oil. Syncromesh is also an oil to stay away from in our boxes.

Do your own research. Just don’t go by info you find on the Internet alone. Contact the companies that make the oil. They will tell you exactly what you need to use. They want your gearboxes lasting, their reputation depends on it.