Transynd in a 4L80E

[Whitetail Addict]

My Dad has an '02 Suburban that is due for a transmission fluid change. He wants to run Transynd in it.
Is it okay/safe/recommended to run Transynd in the 4l80e? I know that it calls for a Dex III fluid, and the Alli TES-295 fluid exceeds that, but it says nothing about it on the Transynd jug.
I know it is a simple question, but a search on this site, a call to the GM dealer and a call to the Alli dealer yielded no results.

 

[The Neens]

How many miles on it?

 

[Whitetail Addict]

130,000. He plans a full flush and internal filter change.

 

[The Neens]

I've had limited experience with 4L60s and 4L80s...They lasted between 90,000 and 120,000 miles...I wouldn't change the type of ATF, Mike would know for sure...

 

[Whitetail Addict]

Thanks Chris, I'll wait for Mike to weigh in.

Nice avatar btw.....I saw it brought up alot of attention in the other thread

 

[duratothemax]

you can run transynd in a 4L80 just fine, the local allison dealer here runs it in their [4L80 equipped] Chevy express parts delivery vans.

 

[Mike L.]

TranSynd will work fine in the 4L80. Chris has a valid point cause it gets scary changing out fluid with that many miles, but if the trans is sound it will be ok.

 

[Whitetail Addict]

Thanks guys.

Mike, I appreciate the extra input. The transmission seems sound, it has been serviced regularly and never abused, i.e.I don't drive it...

 

[Mike L.]

Make sure you change the filter and seal. (critical )

 

[Whitetail Addict]

What seal Mike? Does that come with the filter when you get it from GM, that is where he has ordered it from.

 

[Mike L.]

What seal Mike? Does that come with the filter when you get it from GM, that is where he has ordered it from.

It should come with the seal. It is a rubber steel back sleeve. Many trans guys are lazy and don't replace it.