rayma60927
New member
I Bought A 61 R27 And The Owners Manuel Says To Use 90 Weight For The Transmission On One Page Then On Another Page It Says To Use 40 Weight For The Trans. Anyone Out There Know For Sure. Thanks
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Consensus seems to be that you should use the 90w hypoid oil. BUT, and this is a big but, you must use the GL-4 spec... hard to find these days. The GL-5 that is readily available everywhere has stuff in it that is harmful to bronze, which is used for bushings in the older trannys.