Rough shifting solution
 

Last year sometime I was having problems shifting into 3rd gear and sometimes 4th gear in my FD. If I tried to shift at 6k into any gear it would grind, and I thought the tranny was done.


BUT when I flushed the fluid out with Amsoils, 75w90 severe gear, I dont think Ive ever had a problem shiftiing into any gear since. It even shifts at high rpm, very smooth almost like a new car. For anyone whos tranny grinds, try this stuff, it works!

Thanks for the tip. I need to get my tranny flushed and so I appreciate the suggestion. I think I'll go with that.

I had a similar issue last year where the shifts harder to do and the tranny would heat up a lot...
I went with mobile 1 synthetic truck tranny oil and its so smooth now and no heat. My friend also had this issue but he used GM syncromesh to solve the problem.

Most any good synthetic gear lube will do wonders for a gear box. I've seen trannies go from "this sucker is going out" to "good to go" with a simple gear oil change.

Dale

Yep. Most of the time it has nothing to do with the brand of fluid, just that it's *new*.

Anyone try synchromesh? I have heard this stuff is like a tranny rebuild in a can.

my second is a bit crunchy sometimes, will it help with the lower gears as well

So, if you've got a synthetic, like say Redline, in your gearbox how often do you recommend it be changed?

anyone tried lucas?

i heard neo 75w-90 was very good

isnt it about 60k miles it should be changed, also with the diff

dito, i am having problems with 3rd at redline

where should i go about buying some good synthetic syncro oil??

Uhm look at the 3rd post on this thread..... Its right there. Kwerks buddy used it......... :flamed:

wouldnt really call that a flame there skippy

I put it on there just cause I wanted to put a smiley on there... I dont rally consider it a flame either. Just thought it looked cool.

For preventive maintenance, and because 2nd was a bit notchy when cold, I drained the OE tranny lube and put in Valvoline 75W90 synthetic gear lube. That actually made the notchy 1st slightly worse. I then put in the NEO 75W90 gear lube, and that fixed the problem.

So, that proves to me that all 75W90 gear lubes may not have the same properties (friction modifiers, viscosity, etc.)

Here is what I use and it solved my rough shifts
Mobil 1 Synthetic Gear Lube
LS 75W-140

http://www.mobiloil.com/USA-English/...75W-140LS.aspx

http://www.mobil.com/USA-English/Lub...LS_75W-140.asp

http://www.mobiloil.com/USA-English/...75x140_top.gif

bumping this thread cause i am curious as to where i should go about buying some good synthetic (syncro) tranny oil??

Summit Racing has Royal Purple, great service and quick shipping

I use Amsoil and no problems plus the Garfinkle ETB . I tried Lucas for a few months and did not like it ,back to Amsoil .Some one gave me the Lucas and they tried it as well and they removed it also .

I use the Amsoil synthetic 75w90 in all customer cars with success, Gotham uses the same stuff :icon_tup:

Another Amsoil synthetic 75w90 user here. Have tried Neo, Redline, and GM syncro mesh. Amsoil gives me the best feel of the ones I have tried.

Has anyone used
http://www.idemitsu-usa.com/default.asp?msg=wso&lwd=1

for their engine oil?

I'm on mobile 1 synth now...wondering if its worth switching over...

My recommendation is Amsoil MTG GL-4 oil or Redline MT-90. You can get the Amsoil from any Amsoil rep. Redline is on some store shelves.

I recommend these because the friction coefficient maximizes synchronizer response. I would not use them in the diff though - something like an Amsoil Severe Gear or Redline Shockproof is best for the diff.

IMHO, if you're going to go to the trouble and cost of putting in synthetic gear lubes then it makes no sense to put the same thing in both the diff and tranny. The diff and tranny have much different lubrcation needs, and for not much extra cost you can put the best in both.

Dave

This thread is about gear oil, not engine oil