hey
i got a 90 5spd, what kinda fluid is it again
mt-90 right?

 

Yup .

 

Well while on the topic of tranny fluids whats the best "upgrade" fluid for the VG auto trans?

I want longevity and butter smoooooth shifts !!!!!!!!!

P.S. >>> 89 VG SE MAX

Thanks!!

 

dysfunctional: you could go to napa and grab a gallon of their gl-4 with the teal label. green and i are both using it. it's cheap and i've had no problems at all. i have driven the car very hard since filling it with the napa stuff. or you could waste $50 on that redline ripoff junk. which i'm sure someone will reccomend shortly.

 

Ive got redline MT-90 in my 89 5sp, and it shifts great.. And yes, it is quite expensive...

 

make sure what you get is GL4 and NOT GL5.

all of the dino lube and some of the synthetics, including AMSoil make both of them, so read the labels carefully.

I have AMSoil 75/90 in mine.

 

What's so bad about GL-5? I heard something about brass syncros.

 

I think i heard GL-5 actually eats away the gears or something (don't quote me on that) anyway....amsoil 75/90 is the way to go

 

penzoil has a nice report online comparing the 2. gl-5 contains higher pressure additives which eat away at brass parts, ect..

 

Penzoi mercon manual tranny fluid

 

the napa stuff I have says GL 3-4-5 on the label

 

if you want to go the cheaper route,then this is what ya need..$14 at napa..

 

I found some stuff out today on this...sorry I am bringing this thread back from the dead...

I saw that Sta-lube at NAPA and didn’t like the higher cold rating (85 instead of 75 or 80) and wasn’t sure of that brand because I had never heard of it.

I had the same problem as most on not being able to find GL4.

Here is what I found out. "MOST" GL5 lubes contain a phosphoric acid based additive. This of course eats yellow metals. Our cars have brass syncros (or something in them is brass at least) so GL5 is not recommended.

I went to about 20 stores in several cities around me (went to the cities for work) and finally found a guy in a little city that called some tech lines. He called Valvoline and they told him that Valvoline does NOT use any acidic additives in any of their line and the Valvoline GL5 will work in our transmissions.

That explains why the NAPA brand (not the Sta-lube) lube says it’s rated at GL3, 4 and 5. Unlike the Coastal brand the NAPA brand doesn’t say it’s for top off only. NAPA is just re-badged Valvoline.

Anyway that’s what I have found out and figured I would add it to this thread.

 

Thats assuring, I was REALLY concerned because I ran the Valvoline gl-34&5 for a short time and was debating if it did any damage.

But now running both the Valvoline and the Sta-Lube. The valvoline seamed to break down real bad. The oil gushed out when I drained it. The Sta-Lube, went in like Honey, real thick. When I recently drained the Sta-Lube, it still had a real thick consistancy after atleast 15,000 miles.

 

Great info michael...I have had no adverse effects from the higher cold rating so far...


Here is your reward..

 

sweet where can I pick it up...you did mean I get the actual car right

I like all vettes but here is my favorite style: