ok we all have heard use synchromesh, honda mtf, 10w-30, and so on

some people say that using regular 75-90w gear oil is to thick, but synchromesh is 75-80w. so why would gear oil be too thick?

people also say that the 10w-30 is to thin and feels like **** when shifting

so would using say 20w-50 motor oil be a happy medium between gear oil and 10w-30? any personal experiences other than the common choices?

 

In my ls tranny i had a slight grind into 5th at high rpm shifts...and i drained the tranny, and flushed it, then put gm syncromesh in, and every shift was noticeably cleaner...even had a buddy drive it without telling him, and he asked me "did u get a new tranny?" i wont ever use anything but gm syncromesh (unless something new comes to the market)

BUMP for gm syncromesh!

 

I have used alot of different weights(except gear oil). I have discovered that once a tranny is begining to go there is very little you can do to bring it back. No matter what you use, service the tranny properly and regularly and it's life will be extended. I have always had the best experiences w/ 10w30 though.

Phil

 

im not trying to cover anything up, im just trying to figure out what else might work besides the usual

anyone else?

 

I just put the Honda MTF in there, I figure they might know what's pretty good. No complaints from me. There's probably better stuff out there, but for the money (free!) I can't beat it.

 

Honda MTF works good, but I haven't had tranny problems (yet).

But when you were rambling about oil weights, you gotta remember that engine oil & gear oil have completely different viscosity scales. A 75w-80 GEAR oil isn't that much different in actual viscosity vs. a 10w-30 ENGINE oil.

 

gm synchro is hands down the best.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">But when you were rambling about oil weights, you gotta remember that engine oil & gear oil have completely different viscosity scales. A 75w-80 GEAR oil isn't that much different in actual viscosity vs. a 10w-30 ENGINE oil.</TD></TR></TABLE>

the viscosity of motor oil and gear oil are tested at different temperatures, hence the different sae viscosity grades. if they are tested at the same temperature, then their viscosities are similar.