Six-Speed Trans Fluid?
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
I spoke with Dale at Tremec and he recommended Dexron III or Mobil 1for my July 98 built 99 M6. Manual trans installed at that time were built by Borg Warner which was later bought out by Tremec. The BW trans have paper blockers.
GM TSB states that vehicles previously using Dexron III should now use P/N 88861800 Labelled Manual Transmission and Transfer Case Fluid.
My local speed shop recently installed Amsoil ATF and I immediately began to experience a gear whine when shifting around 3,000 RPM.
So I'm changing to the new GM P/N.
GM TSB states that vehicles previously using Dexron III should now use P/N 88861800 Labelled Manual Transmission and Transfer Case Fluid.
My local speed shop recently installed Amsoil ATF and I immediately began to experience a gear whine when shifting around 3,000 RPM.
So I'm changing to the new GM P/N.
I'm sending in an analysis sample to determine if the Amsoil ATF caused any damage. I doubt it since I had only driven about 200 miles with it in the trans but you never know unless you check.
More to come....
Melting Slicks
Joined: Aug 2004
Posts: 3,003
Likes: 89
From: Indy IN
I spoke with Dale at Tremec and he recommended Dexron III or Mobil 1for my July 98 built 99 M6. Manual trans installed at that time were built by Borg Warner which was later bought out by Tremec. The BW trans have paper blockers.
GM TSB states that vehicles previously using Dexron III should now use P/N 88861800 Labelled Manual Transmission and Transfer Case Fluid.
My local speed shop recently installed Amsoil ATF and I immediately began to experience a gear whine when shifting around 3,000 RPM.
So I'm changing to the new GM P/N.
GM TSB states that vehicles previously using Dexron III should now use P/N 88861800 Labelled Manual Transmission and Transfer Case Fluid.
My local speed shop recently installed Amsoil ATF and I immediately began to experience a gear whine when shifting around 3,000 RPM.
So I'm changing to the new GM P/N.
Standard transmissions, as a result of the synchros have very different lubrication requirements than an automatic. The push for lower fuel consumption tends to result in lower viscosity fluids being specified and sometimes I don't know if that's always a good idea.
As I understand it the Syncromesh fluid was specifically designed for the Tremec six speed so it makes sense to me that it might be worth a try. I'm going to try it in the near future.
