went to a ACDELCO here in Canada and they told me that this part Synchromesh - Manual Transmission Fluid 89021808 is the same as GMSFM 10953509. is this true

 

yes

 

no, you want the friction modified version. ac delco part number 88900399

 

the AC Delco 10-4014 is rebranded GM syncromesh modified friction.


the important words to remember is "MODIFIED FRICTION"

if the bottle doesnt have that on its description, dont buy it

 

It is the wrong one...... Found the right one at a GM dealership new part number is 10953509. Old part number is 88900399/10-1404 thanks everyone for your input

 

^as long as it says "Friction MOdified"

 

^ yes it does ..... Thanks

 

glad you found the FM version and thanks for posting the updated part number

 

I found a place with cheap prices and shipping on this stuff. $9.76 per quart and a $9 handling fee for as many as you want. Most places wanted either a minimum order of 6 quarts or had $20 shipping for two bottles. Still the 88900399 part #. I didn't try my local GM dealer since they only had 1 bottle the last time I went there. The website is GM parts outlet.net. Another plus was it arrived in 3 days.

 

The old GM part# is 12377916.
.
.

 

just had this done today! my cost on fluid was 9.85 a litre,

acura charged me 52.50 to change it,

shifts so nice,

 

Initially went to Chevy and got the wrong one as stated in thread without the Friction Modifiers P/N: 89021808.
Went to GM and got the correct one and AC/Delco has also changed part numbers to: 10953509 (from 10-4014)