H55f Run-in

Cruiserdrew

On the way there
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Mar 15, 2003
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Sacramento, CA
My driveshafts are going back in this afternoon, so I'll have my H55f on the road!! I was wondering if the new tranny needs a break-in period. I filled it with gear oil yesterday, and let it idle for a few moments in each gear. I can do more of that if it's benificial. By they way-I had no unusual noises, or squealing from the piolt bearing that others have reported. I let the clutch out and the t-case output started spinning-a good thing! The tranny shifted smoothly in all gears, except 3rd which was notchy the first shift, but now seems fine. Can I run it immediately on the freeway, or should I drive around town a bit like you would a new differential?

My plan is to run it a few days and change the gear oil in both tranny and t-case. THere is a fair amount of moly grease in the tranfer from the rebuild and I want to flush that out, plus any dirt I might have introduced by having it apart.
 

Radd Cruisers

 
 
 
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Sep 28, 2002
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Vancouver Island BC Canada
Cruiserdrew said:
My driveshafts are going back in this afternoon, so I'll have my H55f on the road!! I was wondering if the new tranny needs a break-in period. I filled it with gear oil yesterday, and let it idle for a few moments in each gear. I can do more of that if it's benificial. By they way-I had no unusual noises, or squealing from the piolt bearing that others have reported. I let the clutch out and the t-case output started spinning-a good thing! The tranny shifted smoothly in all gears, except 3rd which was notchy the first shift, but now seems fine. Can I run it immediately on the freeway, or should I drive around town a bit like you would a new differential?

My plan is to run it a few days and change the gear oil in both tranny and t-case. THere is a fair amount of moly grease in the tranfer from the rebuild and I want to flush that out, plus any dirt I might have introduced by having it apart.


No real break in, guess you could open the drain plug quick and put a finger over the hole and check the magnet for filings, otherwise I prefer a goo brand of synthetic.

Could of taken a bit to get the oil up into the third synchros, pretty big cluster.

Only places I like synthetic is the gear boxes and diffs, long term oil and synthetic does not like to mix with water, so I have been told.

Rob
 

Tapage

Club 4X4 Panamá
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" No real break in, guess you could open the drain plug quick and put a finger over the hole and check the magnet for filings "

Agree .. but important thing about checking the magnets. I thought that some miles around the town is enoough to " brake in "
 
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