View Poll Results: Which fluid is best for a M12 T56?
Redline D4 ATF
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53
8.85%
Royal Purple Syncromax
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179
29.88%
GM Syncromesh
![](https://ls1tech.com/forums/images/polls/bar4-l.gif)
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154
25.71%
OEM Dexron III ATF
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213
35.56%
Voters: 599. You may not vote on this poll
Which T56 fluid?
#301
TECH Fanatic
iTrader: (2)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Swapped to pennzoil synchromesh (same as GM AFAIK) this morning and I'm happy so far. Info on my trans:
fully rebuilt with lots of new hard parts ~1 year ago, upgraded to carbon blockers and put in Mobil 1 synthetic ATF, swapped for fresh mobil 1 again 500 miles after the rebuild. The trans felt notchy almost a metal on metal feeling from the **** with lots of noise in neutral at idle.
I assumed most of my problems were due to the cruddy korean input shaft I dropped in. After the pennzoil the trans is quieter and shifts feel much easier without the odd feel. If it goes back to feeling crappy I'll try Dex 3 next. But I'm very happy with the pennzoil so far.
fully rebuilt with lots of new hard parts ~1 year ago, upgraded to carbon blockers and put in Mobil 1 synthetic ATF, swapped for fresh mobil 1 again 500 miles after the rebuild. The trans felt notchy almost a metal on metal feeling from the **** with lots of noise in neutral at idle.
I assumed most of my problems were due to the cruddy korean input shaft I dropped in. After the pennzoil the trans is quieter and shifts feel much easier without the odd feel. If it goes back to feeling crappy I'll try Dex 3 next. But I'm very happy with the pennzoil so far.