T-350 break in procedure? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-02-2010, 10:56 PM
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T-350 break in procedure?

Is there any type of break-in procedure for a rebuilt TH? I have a TH350 with stock guts and a Hughes Performance rebuild kit. Any recommendations for dropping the pan at 500 miles or anything like that? I have heard from at least one builder that a service should be performed at 500 miles after a rebuild, but others (not necessarily builders, but experienced techs I would trust) have said it's not necessary.

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Old 06-03-2010, 01:29 AM
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DRIVE IT LIKE YOU STOLE IT! Factory owners manuals don't even recommend
transmission service till several thousands of miles. Do what makes you feel good. Drive it for a couple of months and change the filter and bring the fluid back up to full. The bottom of the pan will tell you how good a job the re-builder did. If it's assembled correctly the only problem is dirt and stuff that didn't get cleaned off or out.

Who did the rebuild?
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Old 06-03-2010, 06:32 AM
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Personally, I pulled the pan at around 500 and changed filter and topped up fluid. There were a minor amount of disc particles. I dont think enough for harm but for the 20 bucks in filter and fluid I feel better. It'll give ya piece of mind
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Old 06-03-2010, 10:34 PM
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It was rebuilt by a trusted source, so I'm not concerned there. Just curious what others recommend in general. I may drop the pan after a while (maybe 500 miles, maybe more), but I have sometimes thought it was pointless. If something is wrong there's not much you can do without dropping the transmission. I suppose sqzbox is right, "Drive it like you stole it." If it's gonna go it's gonna go...
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Old 06-04-2010, 05:16 AM
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Quote:
Originally Posted by PontiacPhil
It was rebuilt by a trusted source, so I'm not concerned

Begs the question. Why'd ya ask?

We.ve mostly all done our own so have a look see for piece of mind. If your trusted source is trusted. Dont ask about what you say you've already made up your mind on. DRIVE
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Old 06-04-2010, 07:28 AM
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Quote:
Originally Posted by sooper
Begs the question. Why'd ya ask?

We.ve mostly all done our own so have a look see for piece of mind. If your trusted source is trusted. Dont ask about what you say you've already made up your mind on. DRIVE
What I was asking is if any experienced trans builders recommend using a specific break-in procedure, similar to a new diff gear set or a new engine. Has nothing to do with the quality of build. If I had said I built an engine and was not concerned about the quality of build I would still need to do a break in. Not sure I understand where the attitude's coming from...

But I very much appreciate the input. Sounds like the answer to my one and only question was "No". Took it out last night and gave it all she had and it was awesome!
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Old 06-04-2010, 10:23 PM
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350 break in

after more than 30 years in the transmission repair business found this to be true. ask the same question to 50 people and you get 50 different answers.
transmissions are either right when installed or not there is no break in . that not to say today's transmission's don't go though a relearn process after a rebuild.
the good old days god I miss them
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