No need to be sorry Patrick! Just trying to pass along information. I may try RP next time I change my trans fluid.
Vintage-Nut
DEC 28, 09:39 AM
Yes, Royal Purple Synchromax Fluid Cross Reference uses the older GM Synchromesh number 12345349, not the current GM numbers which are shown above.
You can contact Royal Purple’s Automotive Technical Support Dept. at 888-382-6300
Vintage-Nut
DEC 28, 01:27 PM
Only an Update
I edited my posts above to response 82-T/A's question: "what does the LSD additive do?" as I can’t find the thread which recommends adding 'Limited Slip Axle Lubricant Additive' when using standard GM Synchromesh Fluid.
Also remember the 'other' GM Fluid too: Synchromesh - Friction Modified (GM 88900399 / ACDelco 10-4014) which standard GM Synchromesh Fluid have less of FM.
USA Photo of GM / ACDelco Synchromesh - Friction Modified Fluid
[This message has been edited by Vintage-Nut (edited 12-31-2023).]
