masospaghetti
Explorer Addict
- Joined
- October 22, 2006
- Messages
- 1,526
- Reaction score
- 160
- City, State
- Huntington Beach, CA
- Year, Model & Trim Level
- 98 XLT, OHV, 4D, 4x4, 5M
Just wanted to share this. I've been trying to improve the shift quality of my M5R1 transmission since I got the truck in 2006. Always has been notchy and quite stiff when cold. Tried Mercon, Mercon V, Mobil 1 ATF, 0w-20 synthetic, synchromesh. Nothing seemed to really make any difference.
I tore down the trans and rebuilt it with new bearings, synchros, and seals. Filled with Mercon V. Still notchy. Haven't tried it when cold yet.
I discovered this stuff - "GM Manual transmission fluid" - which seemed like a promising upgrade. Same viscosity as Mercon but with additives specifically for manual transmissions. The base stock is Dexron III. So far I am very happy with the shift quality although I haven't tried it in cold temperatures yet. Just thought i'd share if anyone else wanted to give it a shot. Right now its $6.59 a quart with free shipping (trans takes 2.8 quarts).
http://www.amazon.com/ACDelco-10-40...sbs_263_1?ie=UTF8&refRID=1RVJD64ZTR7986QCM9B1
I tore down the trans and rebuilt it with new bearings, synchros, and seals. Filled with Mercon V. Still notchy. Haven't tried it when cold yet.
I discovered this stuff - "GM Manual transmission fluid" - which seemed like a promising upgrade. Same viscosity as Mercon but with additives specifically for manual transmissions. The base stock is Dexron III. So far I am very happy with the shift quality although I haven't tried it in cold temperatures yet. Just thought i'd share if anyone else wanted to give it a shot. Right now its $6.59 a quart with free shipping (trans takes 2.8 quarts).
http://www.amazon.com/ACDelco-10-40...sbs_263_1?ie=UTF8&refRID=1RVJD64ZTR7986QCM9B1