Trams build solenoids

[paytonlb7]

I am in the process of ordering parts to rebuild my transmission for my 2007 lbZ. It had over 200k miles so I was planning on replacing Torrington bearings, stator and pump bushings, c5 clutch, and solenoids. My question is what solenoids are everyone replacing when doing this? All 7 or just some? Thanks!

 

[paytonlb7]

Bump anyone?

 

[IOWA LLY]

Unless your having issues that point to a possible bad solenoid I wouldn't replace any of them.

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[paytonlb7]

Unless your having issues that point to a possible bad solenoid I wouldn't replace any of them.

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I had the same thinking you do until I read a post from Mike L , it just didn't specify which ones. I figure while I have it on the bench I might as well.

 

[PACougar]

The thing is even if you ever have one go bad they're so easy to replace with the trans in the truck.

 

[minerigger]

The thing is even if you ever have one go bad they're so easy to replace with the trans in the truck.

True that man.

 

[jc1843]

Probably 90% of Trans Solenoid fault codes are for stuck valves-- not bad solenoids. They don't go bad very often.

 

[Mike L.]

I had the same thinking you do until I read a post from Mike L , it just didn't specify which ones. I figure while I have it on the bench I might as well.

What did I post?

 

[9mmkungfu]

What did I post?

This:

http://www.duramaxdiesels.com/forum/showpost.php?p=466093&postcount=2

 

[paytonlb7]

This:

http://www.duramaxdiesels.com/forum/showpost.php?p=466093&postcount=2

Yes this is the post I was referring too. Thanks for finding it!

 

[IOWA LLY]

If you want to replace them then replace all of them. Since your doing it as preventive maintenance and not because you have a problem. Better put a new wire harness in while your at it also. And an internal mode switch just to be safe. Oh and a new oil pump. Might as well throw a fresh extension housing on to be safe since they sometimes crack. Every once in a while you will pull the threads out of the main housing where the bellhousing and or the extension housing bolt on so add one of those to your list.


Or you could not be silly, and disassemble and clean everything first. Then check everything over good and replace what is damaged, wore out, leaking, etc. And then replace what is actually bad.

This idea some people have that if they throw everything at an Allison they can it will magically hold is just ridiculous.

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[Mike L.]

I posted that up there because I now get great deals on solenoids. So after 250K miles, it may not be a bad idea.

 

[paytonlb7]

If you want to replace them then replace all of them. Since your doing it as preventive maintenance and not because you have a problem. Better put a new wire harness in while your at it also. And an internal mode switch just to be safe. Oh and a new oil pump. Might as well throw a fresh extension housing on to be safe since they sometimes crack. Every once in a while you will pull the threads out of the main housing where the bellhousing and or the extension housing bolt on so add one of those to your list.


Or you could not be silly, and disassemble and clean everything first. Then check everything over good and replace what is damaged, wore out, leaking, etc. And then replace what is actually bad.

This idea some people have that if they throw everything at an Allison they can it will magically hold is just ridiculous.

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Wow buddy thanks for the great advice really helps since that wasn't my first thought when starting this process. Maybe taking advice from one of most well known transmission builders around isn't a good idea.

 

[Mike L.]

Wow buddy thanks for the great advice really helps since that wasn't my first thought when starting this process. Maybe taking advice from one of most well known transmission builders around isn't a good idea.

You're right. I don't know anything.

 

[IOWA LLY]

I think he was making a dig at me, not you because of my sarcastic comment Mike. And trying to butter you up in the process.

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[paytonlb7]

I think he was making a dig at me, not you because of my sarcastic comment Mike. And trying to butter you up in the process.

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Yes I was making a dig at you. Of course my first plan of action is to clean and inspect every part of the trans then replace what's needed, but the reason any of us read or write on these forums is to gain knowledge of what other people have done. To help other people learn from out mistakes and our successes. So why the need for the smart ass comment!? I don't get it, to each their own I guess

Mike- I was neither trying to offend you or butter you up. You are the Allison guru so when I stating prepping for this I did a lot of research reading your posts and comments because I know you are a creditable source. My tranny has just over 210k miles on it so I am not quite to your 250k mile recommendation of replacing those parts.

 

[Mike L.]

No offense taken.

 

[IOWA LLY]

Yes I was making a dig at you. Of course my first plan of action is to clean and inspect every part of the trans then replace what's needed, but the reason any of us read or write on these forums is to gain knowledge of what other people have done. To help other people learn from out mistakes and our successes. So why the need for the smart ass comment!? I don't get it, to each their own I guess

Mike- I was neither trying to offend you or butter you up. You are the Allison guru so when I stating prepping for this I did a lot of research reading your posts and comments because I know you are a creditable source. My tranny has just over 210k miles on it so I am not quite to your 250k mile recommendation of replacing those parts.

I don't think you know what you want.

You claim to want Mike's opinion even though you already had it. So you were on here looking fo a different answer.

You claim to want opinions from other members of the forum, yet you choose to ignore mine. No one else chimed in which is not my fault.

If you only want to know Mike's opinion I suggest you call him directly. He won't steer you wrong.

Im sorry if I hurt your feelings.


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[PureHybrid]

I'll chime in.... Leave the solenoids alone much as possible. You can test them easily. If you take them all out and fondle them, they'll probably end up taking a poo on you. Its not that touching them will make them go bad, but "if it ain't broke don't fix it".

 

[Mike L.]

I'll chime in.... Leave the solenoids alone much as possible. You can test them easily. If you take them all out and fondle them, they'll probably end up taking a poo on you. Its not that touching them will make them go bad, but "if it ain't broke don't fix it".

The trim solenoids must be tested on a solenoid dyno. You need to see how many amps it takes to fire them and at what pressure that happens. Then you need to see what pressure they release at. 12 volts off a battery won't tell you if they will operate correctly as the TCM will use a lot less amps to fire.