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Old 07-24-08, 12:12 PM   #1
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H55F tranny - gear or transmission fluid??
Hey folks - in Montana on a road trip and need to change the fluid in my tranny. I just drained it and it smells / looks like gear oil... is that what i need or does the 5 speed H55F take automatic tranny fluid?

Thanks for the help guys!
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Old 07-24-08, 12:26 PM   #2
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The H55f takes gear oil, I use 85-140w use good stuff, I use an additive like Swepco or Lucas oil stabilizer.


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Old 07-24-08, 12:44 PM   #3
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The factory spec is 90W gear oil, but most run 80w-90 or 75w-90.

I've run Mobil1 and Redline in mine, and overall, I prefer the Mobil1 75w-90, just because it is easier to get. I don't know about running 85w-140, it seems like needles parasitic drag, but maybe it's OK in a worn or noisy tranny.


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Old 07-24-08, 01:33 PM   #4
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I run gear as well Amsoil 80w/90


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Old 07-24-08, 02:01 PM   #5
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Castrol 80W-90 here .. over several years on my H55F without problems.


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Old 07-24-08, 02:27 PM   #6
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Welcome to Montana!!
I would use Castrol 80W-90. Use Castrol oil in all my rigs with no problems.

Josh

P.S. What section of Montana are you in? I live near Whitefish.
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Old 07-24-08, 03:20 PM   #7
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Quote:
Originally Posted by Cruiserdrew View Post
The factory spec is 90W gear oil, but most run 80w-90 or 75w-90.

I've run Mobil1 and Redline in mine, and overall, I prefer the Mobil1 75w-90, just because it is easier to get. I don't know about running 85w-140, it seems like needles parasitic drag, but maybe it's OK in a worn or noisy tranny.
Just experience, the H55f gets pretty hot on the highway and in the bush. Just got back from the North West Territories over 5000Km trip. 85w-140 is good for severe use, like 14hr steady running. I averaged 28mpg with my BJ74, I dont think there was any "needles parasitic drag" . When I used to run 80w 90 gear oil I would get tiny shavings on the magnetic drain plug.


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Old 07-24-08, 06:04 PM   #8
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Quote:
Originally Posted by Tapage View Post
Castrol 80W-90 here .. over several years on my H55F without problems.
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Originally Posted by gpx433 View Post
Welcome to Montana!!
I would use Castrol 80W-90. Use Castrol oil in all my rigs with no problems.

Josh

P.S. What section of Montana are you in? I live near Whitefish.
Its the most popular in oz too. Quietens the bearings and makes shifting a little easier


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Old 07-24-08, 08:20 PM   #9
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Valvoline Synthetic Gear Oil.


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