Allison information

[psomers]

For GM owners with Allison transmissions. If you are a DIY or at least like to manage your maintenance, here is a long but informative forum thread: http://www.duramaxforum.com/forum/tr...-transynd.html

[8.1al]

I'm a firm believer in synthetic oils and have had Trans Syn in our Allison since 25,000 miles

[kdeiss]

quote:Originally posted by 8.1al

I'm a firm believer in synthetic oils and have had Trans Syn in our Allison since 25,000 miles

Trans Syn here also serviced at the Allison Dealer

[bethandkevin]

Since around 2007 model year when Dexron VI was introduced, GM vehicles equipped with automatic transmissions come with synthetic transmission fluid (Dexron VI) installed from the factory.

[8.1al]

Dexron VI is a blend, not a full synthetic like Transynd and probably doesn't offer the extended service intervals of Transynd

[knighton91]

I used the process discussed in this article on my 2008 GMC replacing the factory fluid with the TranSynd and noticed a world of difference in the hard shifting that I had previously experienced with my Allison transmission.

[psomers]

Something else if you replace your own spin on filter. Be aware there is a doughnut shaped magnet on the filter. Some times it sticks to transmission and some times it sticks to the filter. Stuck to transmission no problem but there have been a lot of magnets thrown away when stuck to filter.

[Hooker]

Transynd, when properly tested, will last 300,000 miles. Those interested in getting some good info on the Allison, should join www.irv2.com. There is a retired Allison engineer, Tom Johnson, who is a regular poster on the Allison forum and has some very good information.