r6cavy

Previously posted a bit about this. Originally had a rough shift 2-3 low tpms . like a bad shift within a stick. Did both in auto and with manual. Also have a 3-2 bump when stopping that I can use manually avoid if shifting down at a lil higher rpmReset values with durametric. No dice. Then brought it to local respected Indy. Then suggested fluid and filter change along with gearbox oil. So I did that. They didn’t find any big chunks of metal in the pan. Now it shifts smooth up to 4500 rpm then bang. All other gears are fine and smooth. Indy suggested replacing. Took it to a recommended transmission shop that has plenty of experience with 722.6 Mercs for second opinion. . They looked it over and found the same harsh shift at high rpm and 3/2 bump but said they lacked the proper diagnostic tools and haven’t worked on many 996 trannys. They said they couldn’t fully diagnose without tearing it apart and said they wouldn’t want to charge me to do that without knowing if it’s a simple fix , a valve body replacement or a total rebuild. I’m in the Syracuse by area. So does anyone know if theres a shop that might be able to diagnose. Or should I just get used 60k tranny off eBay and have it installed. Or just drive it and keep it under 4500 rpm until it starts to really fail ?

wyovino

My guess is that an invasive inspection would cost about $400, which would be absorbed should major work need to be done. I was quoted around $6k for a full rebuild. I would go for the detailed inspection and then make a decision. The problem with a used tranny is that you don't really know what you're getting. Either way you're going to be spending some money.

For reference, I noticed a slipping in fourth gear above 3000 rpm. My indy sent me to a transmission specialist. He opened it up and said that it's currently not too bad but eventually I would need a rebuild. He recommended that I live with it until it gets worse. They changed the filters and fluid at the same time. I barely notice the slipping anymore. I don't know if that's from the maintenance they did or if I've just gotten used to it. That was two years ago and it hasn't gotten worse.

r6cavy

Thanks for the response. I’m hoping it just needs valve body repair replacement. But yea.. it’s still gonna be a good chunk $$$. Used with 6 month warranty would be about 1k shipped plus labor to uninstall and reinstall fluids etc. I may follow your lead and drive it until it gets worse. Big problem for me is I can’t seem to find a local transmission shop that’s comfortable working on it. I posted on flat 6 Facebook to see if anyone knows of a place in upstate ny

Joel987

The tip in my 02 leaks tranny fluid out of the front case (not pan where the filter is located). I had the filter and fluid replaced when I first got the car and it shifts just fine. The leak drives me nuts. The shop found a company that makes the gasket (not available from Porsche), but it's about a $2k job. From what I was able to research the components are in fact Merc 722.6, but the case is custom designed to fit the 911. I also haven't seen many, if any posts where you can remove the tiptronic without taking the engine out. I believe everything comes out as one unit and then the transmission is separated from the engine.

Perhaps you can find an Indy that will take the motor and tranny out (or do it yourself), but then you still have to find a shop that is willing to take apart the transmission. I haven't looked really hard yet, but another local Indy told me he knows how to take it apart, but won't because he really doesn't have a clean environment to assemble it. Another Indy in my area who rebuilds Porsche engines as well as all other types of repairs and mods won't touch an automatic transmission.

I may have to resort to checking the fill hole at the beginning of the driving season and topping off the fluid if low. In the meantime I stocked up on oil absorbent sheets and lay down the "diapers" under the car after driving. There doesn't seem to be many choices.

berni29

Hi

I would go with a secondhand transmission. Just so long as you can verify its history. By that I mean that maybe it came out of a crashed car so was working at the time or similar. I have removed the TIP transmission from my 993 and 986 without removing the engine, so i am sure it can be done in a 996. Check the IMS while you are there.

Berni

c210rg

Actually you can remove a Tiptronic from a 996.2 without removing the engine. You need to remove the starter. My local Porsche dealer only removes the transmission when doing IMS bearings on Tip equipped 996's. Just FYI.

Joel987

c210rg - that's great news! I'm sure if the dealer does it that way it must be faster than dropping the engine with it. I wonder if there is a factory procedure for it or perhaps the mechanics at that dealer got creative enough to figure out how to remove it with the engine in place.

Mark I

Consider giving Jake Raby a call. Some time back, he had a later tip or two that he was willing to part with very reasonably.

c210rg

There is a video somewhere on You Tube of a guy pulling a Tip out, I can't find it now, it's somewhere out there? And I saw a thread on some forum of a person doing it. Sorry I am not more help.

r6cavy

Thanks for the responses. I’m trying to find an Indy thats in state that has experience. I live in Syracuse ny. So far no local shops will mess with the automatic. I’d be willing to drive if needed. Anyone know of anyone in nys that knows these transmissions.
Maybe I’ll check on the merc forums.

pfava1

Try these guys in Jersey. I spoke with the owner on the phone about a tip (merc 722.6) rebuild. I haven't used them but he seemed really knowledgeable. Please let me know your experience if you decide to go with them!
https://www.importperformancetrans.c...ct_list&c=2685

JBSL

My Indy only dropped the tip on mine when doing the IMS and AOS as well.

sasilverbullet

I've read, can't remember where, that it is possible to drop the engine and leave the tip. Factory procedure is they have to be done as a unit because there's no way (supposedly) to mate the tip and engine in the car.