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Is this transmission fluid a good full synthetic transmission fluid to use even though it says Dexon VI - Mercon LV? for a rebuilt TH400? On the back it does say that this is compatible with all GM Hydra-Matic trannys and I know the TH400's use Dexron VI. Ive done some googling and see that the Mercon LV fluid is NOT the same as Dexron VI. it seems like a lot of fluid I've looked at have been the Dexon VI - Mercon LV.
1. Am I able to use this fluid without any issues? or should I be looking for exclusively Dexron VI?
When I search Summit for Mercon LV, it appears just about every offering combines it with Dexron VI. Given that I'd say it's fine. Or, if you have a ticking eyelid over it, go with Delco Dexron VI - that's what my rebuilt TH400 has in it.
Is this transmission fluid a good full synthetic transmission fluid to use even though it says Dexon VI - Mercon LV? for a rebuilt TH400? On the back it does say that this is compatible with all GM Hydra-Matic trannys and I know the TH400's use Dexron VI. Ive done some googling and see that the Mercon LV fluid is NOT the same as Dexron VI. it seems like a lot of fluid I've looked at have been the Dexon VI - Mercon LV.
1. Am I able to use this fluid without any issues? or should I be looking for exclusively Dexron VI?
A lot depends on the clutches used during rebuild. Good 'ole Type F works great and helps firm shifts. Years ago, Dexron was considered a "high lubricity" fluid to shift smoother and Type F was considered a "High Impact" fluid. Most shift kits tell you to move to Type F. Newer fluids are geared toward fuel mileage and tighter tolerances.
Race folks will often use Hy-Gard fluid from John Deere to work even better in T-400's, PG's etc.
Transmission question.
