Hey folks,
I replaced my transmission fluid with Redline MT-90 (GL-4) about 4 months ago, with only weekend driving since. I can't have put more than 1500km on it since (liberal estimate). Recently the stick has lost a lot of smoothness and become clunky and rough. The roughness is only in the stick - I don't notice any decrease in performance in the synchros.
Initially I thought I'd lost a lot of fluid leaking into the transfer case as tends to happen on older 4x4s, but i checked the level and fluid came dripping out of the tranny fill plug when cold (perhaps some leaked the other direction?). Is there anything that could cause a dramatic loss of viscosity in GL-4? Can engine oil leak into the tranny somehow? Or could something be loose in the linkage that is just giving the impression of an issue?
I replaced my transmission fluid with Redline MT-90 (GL-4) about 4 months ago, with only weekend driving since. I can't have put more than 1500km on it since (liberal estimate). Recently the stick has lost a lot of smoothness and become clunky and rough. The roughness is only in the stick - I don't notice any decrease in performance in the synchros.
Initially I thought I'd lost a lot of fluid leaking into the transfer case as tends to happen on older 4x4s, but i checked the level and fluid came dripping out of the tranny fill plug when cold (perhaps some leaked the other direction?). Is there anything that could cause a dramatic loss of viscosity in GL-4? Can engine oil leak into the tranny somehow? Or could something be loose in the linkage that is just giving the impression of an issue?