Glad it worked out for you. I've been using Royal Purple Syncromax for a few years now and works great.

 

Glad someone brought one of my old threads from the dead. It's very fitting.

I've ran the OEM fluid, Motorcraft fluid that I purchased, Royal Purple Syncromax, Amsoil ATF and now am using Pennzoil Synchromesh and it's much better than any of those fluids ever were from the beginning. I contacted Tremec because I was simply fed up with it. Tremec told me they have been doing tons of testing on the TR3650 because of complaints, etc. Tremec is now recommended GM Synchromesh, which is very expensive, or Pennzoil Synchromesh. Tremec also recommends replacing it every year. According to a lot of people it gets better as you use it and I've already noticed it. It's been in my car for about 200 miles so far. I would highly recommend it.



I ran it. It was great for some time but fell off with mileage and hard use.

I did a fluid swap to Amsoil Synthetic ATF, completely changed the transmission; now the transmission shift so smooth and easily. I would highly recommend this to anyone with a TR3650, this has to be one of the best bang per buck mods you can do.

I ran it. It was great for some time but fell off with mileage and hard use. According to Tremec the high quality ATF fluids like Amsoil is too slick for the syncros.

have you ever tried amsoil's synchromesh?
AMSOIL - Synthetic Manual Synchromesh Transmission Fluid (MTF)

No, I have not.

 

I'm looking at some Synchromax for mine! Yay RP

 

have you ever tried amsoil's synchromesh?
AMSOIL - Synthetic Manual Synchromesh Transmission Fluid (MTF)

 

I did a fluid swap to Amsoil Synthetic ATF, completely changed the transmission; now the transmission shift so smooth and easily. I would highly recommend this to anyone with a TR3650, this has to be one of the best bang per buck mods you can do.

 

Nasty you should get the CHE k-member support just kidding

Im surprised that you got such a better performance out of Amsoil but then again I believe my trans had RP in it before and it really didnt change anything putting fresh trans fluid into it.

Nasty I hate you now im gonna be buying Amsoil next week when I get paid

 

Damn it I need to read dates more often. I think ive seen a lot of places with the Pennzoil Synchromesh around here. Good then forget the Amsoil im getting the new floormats and rocker stripes as planned. Maybe... we'll see next week.

 

I have 3 qts of fresh Amsoil in the garage now. I keep telling people it's the Shizz!!!

 

I'm the biggest supporter of Amsoil. It's the only thing I'll run in everything I own even a lawn mower. However, I can tell you that the Pennzoil Synchromesh works better than the Amsoil ATF in our TR3650s. Hands down. Hopefully it pans out and lasts.

 

+1 on the penn synchromesh. I learned this the hard way in the old trans in my 02. I used synthefic mobil 1 and filled it too stock specs. That fluid is too slippery for the synchros in the tr3650. Tremec calls for exactly 3.2 liters of the gm or pennzoil synchromesh. Made a world of difference.

 

3.2 qts, 3.0 liters.

 

OOPS! What Nasty said

 

i wonder if this will be the same fluid recommended for the T56

 

DAMNIT! i just put RP in mine! oh well it still has made a lot of difference. we will see how well it lasts and if not ill try penn. synchromesh

 

From what I have read RP will begin to wear your synchros quickly. I only used mobil 1 synthetic atf, and it started within 5 weeks.

 

It's still progressively been getting better. I haven't even been driving all that much the past few weeks either. Very impressed with it!

 

I am obsessed with fluids and did a ridiculous amount of research when I bought my car. Here is the shortened version of what I learned...

1) Ford filled the TR3650 with the wrong amount of fluid. Tremec specifies a lesser amount. I forget the exact specs but basically Ford filled it to the fill hole whereas is should be filled to 3/4" below the bottom of the fill hole. I found all the TSB's and Tremec announcements to verify this.

2) Royal Purple is great stuff, I use RP engine oil and RP rear diff fluid BUT DO NOT PUT ROYAL PURPLE SYNCROMESH IN YOUR TRANNY!!! It may work great, but Tremec has done testing with it and advises against it. In my research I saw someone post an actual email from a Tremec rep who told him that they don't recommend RP syncromesh because there is an additive that will prematurely break down the blocker rings. It will work great for a good amount of time but will eventually cause problems. I saw other testimonials where people gave accounts of calling Tremec and were told the same thing.

3) Tremec recommends a few different fluids (a havoline blend, one of the Merc's) but out of the ones that their research endorses, GM Synchromesh is by far the superior fluid. Yes GM (shhhhhhh). It's pricey though at $18 a quart but totally worth it.

4) A lot of you are mentioning Penzoil syncromesh. Penzoil Synchromesh is GM Syncromesh repackaged in a yellow bottle and sold for half the price. I used GM syncromesh because I couldn't find Penzoil Syncromesh but there's a GM dealer with a parts counter near my house so I shelled out the extra couple bucks.

5) Personal Testimony - With the incorrect factory amount of the non-synthetic ATF that Ford puts into the TR3650, my car shifted terribly. Almost to the point where I wondered if I had bad syncros. And in the winter it felt like I had cold pancake syrup in my tranny until I drove for 15 minutes. With the CORRECT amount of GM Syncromesh it feels like a brand new transmission. Never grinds and shifts like butter. It felt better right away but TRULY felt amazingly better after about 2 weeks of being in the tranny and I know it doesn't have additives that will cause problems further down the line.

6) I have heard good things about AMSOIL and Redline but then again I've heard good things about GM Synchromesh but the difference is that Tremec has done research that ASSURES that GM Synchromesh will not cause problems. I have not heard of them doing any research with AMSOIL or Redline fluids. So AMSOIL "may" or "may not" cause problems in the TR3650 but why take a chance when Tremec has already done research, tested, and endorsed a high quality fluid.

I'm no expert on Mustangs but I have done my due dilligence on this topic. Bottom line, best thing you can do for your tranny is put the correct amount (3/4" below bottom of fill hole) of GM Synchromesh in your tranny.

If anyone wants me to find the documentation to back up any of what I've said I can hunt it down for you.

 

I agree with most of what you have said but a few things I wanted to touch on. I know we're splitting hairs here but it's good for the thread.

I can tell you the Amsoil ATF was no good in my experience. If you mean their MTF than I have no idea.

Pennzoil Synchromesh and GM Synchromesh aren't the same things in different bottles. Pennzoil Synchromesh meets GM's standards to be an acceptable fluid. It's very similar but not the same thing. I've been told this by Tremec as well as that the fluid should be 1/4" below the fill hole. Either way, this last time I disregarded measuring it and simply made sure to drain as much as possible and fill it with exactly 3.0 liters or 3.2 qts of Pennzoil Synchromesh.

As far as I know from my research the issue with FoMoCo filling the TR3650s with the wrong amount of fluid was never during the S197 model years. It was with the New Edges and they filled the transmission with 3.8 liters or quarts, can't recall of the top of my head.

 

I agree with most of what you have said but a few things I wanted to touch on. I know we're splitting hairs here but it's good for the thread.

I can tell you the Amsoil ATF was no good in my experience. If you mean their MTF than I have no idea.

Pennzoil Synchromesh and GM Synchromesh aren't the same things in different bottles. Pennzoil Synchromesh meets GM's standards to be an acceptable fluid. It's very similar but not the same thing. I've been told this by Tremec as well as that the fluid should be 1/4" below the fill hole. Either way, this last time I disregarded measuring it and simply made sure to drain as much as possible and fill it with exactly 3.0 liters or 3.2 qts of Pennzoil Synchromesh.

You are correct I just found this on another forum

I just got this email from Pennzoil today:

Dear Jason,

The synchromesh fluid that Pennzoil-Quaker State makes meets the warranty and performance requirements of the GM 12345349 part number for your application. It is not the same fluid that is in the GM synchromesh fluid package, so you can make your purchase choice based on price if you choose.

If you have any other questions or comments, please contact us at 1-800-458-4998, M thru F, 8am to 5pm, CST.


And about the being 1/4" or 3/4" I believe you are correct too (I changed it 6 months ago so I can't remember all the exact #'s). The reason 1/4" sounds correct to me now is I remember sticking my pinky finger in the fill hole and I remember not having to reach down that far.

Sorry for these innacuracies

 

Sorry to bring this thread back from the dead. But I just changed my fluid to Pennzoil symchromesh fluid. I also did this in my 02 gt and it made a world of difference. On the 02 I drained it from the bottom and refilled it with 3.2 qts on the top with the shifter removed.

I can into an issue tonight and I'm looking for some feed back. On my 06 I drained it from the bottom, gave it plenty of time to drip out. Same as usual... But with I went to refill it in the fill hold on the side of the trans it took 3 qts, but when I went to put in the other .2 qts needed it started to spill out the fill hole.

My only concern is there being too much fluid and causing an issue with the synchronizers like the 02-04 gt's had when they had too much fluid.

Any thoughts?

 

Did you make sure to have the vehicle on a level surface? Also, did around 3qts come out of it???

 

At first it was not level so I jacked the rear up as well so that it would be level. Then it took most of the .2 qts. But it was dripping out of the fill hole again.

My main concern is that tremec states that it is suppose to be below the fill hole. Just not sure if I would take a bit out or let it be.

 

And yes I measured about 3.2 qts of old fluid in the drain pan.

 

I'm not sure dude. I put in 3qts (didn't worry about the .2) and nothing came out... Give it a minute and someone else will hop on here.

 

Thanks King. I have only moved the car from one spot to the another, and its already quieter. And it wasn't even noisy to start with lol.

If nobody chimes in Ill probably just pull some out to play it safe.

 

Does anyone know where the thread for the fluid install is?


Sent from my Autoguide iPad app

 

I just got an 07 GT with the TR3650, Im having problems with a grind in first and second and also a rattle, I appreciate all yall have researched on the fluids and I will be putting it in mine. Anyone have any ideas as to what the rattle may be? I was told exhaust heat shield but it is coming from the shifter, I can feel it. thanks again.

 

1st off welcome to the forum.. nice dig of a 5yr old Nasty started thread..

You will need to check the linkage if it is the shifter... Miles will be a factor in your grinding issue.. does it do it on up and down shifts... under how hard acceleration is it happening.. changing the oil would be a good idea no matter what else you do