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Old 01-31-2011, 08:59 AM   #1
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Dana 300 rebuild question

Hi guys. I'm from the TJ side of this forum but have a question about a Dana 300. My son has a cj7 and ordered LoMax 4:1 gear set for it and wanted to know if putting them in ourselves is something we want to undertake. I have rebuilt my 231 and it was not a big job but wanted your opinion of wether we should try it or find someone to do it for him. Thanks.

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Old 02-04-2011, 09:16 PM   #2
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You should be able to rebuild a Dana 300. If you did a 231

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Old 02-05-2011, 10:38 PM   #3
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Thanks. It happens next week.
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D30 w/powertrax no-slip,D35 w/ultimate 35 upgrade OX locker,4.56 gears,Air on Board, Mile Marker Winch
Warn Lockout Hubs

FIVE GRANDCHILDREN!!!!
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Old 02-06-2011, 09:17 AM   #4
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Hey Texas T, hopefully we have gears by then! Still haven't arrived...
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Old 02-07-2011, 01:57 PM   #5
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Little more consuming than a NP231 but doable.Only tip I have is when installing the 48 roller bearings.Use an 11/16: socket to hold all the rollers in there.You'll see what Im talking about when you disassemble it

If you lose any parts or need any, I have 3 Dana 300s disassembled here.Good Luck
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Old 02-21-2011, 07:59 AM   #6
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Well it took a while, but we rebuilt the tcase and upgraded to LoMax gears. All went together good even the 48 needle bearings (thanks for the tip). The difference the 4to1 makes is unbelievable. Great upgrade project.
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D30 w/powertrax no-slip,D35 w/ultimate 35 upgrade OX locker,4.56 gears,Air on Board, Mile Marker Winch
Warn Lockout Hubs

FIVE GRANDCHILDREN!!!!
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Old 02-21-2011, 09:42 AM   #7
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the difficult part of the Dana 300 is to set bearings endplay with shims, not a big deal but you have to take care of it, 231 is way easier, just put the bearings on

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