6 years of trying out transmission fluid review

[cupa-joe]

Originally Posted by RippinGSX

I use 3 parts GM syncromesh to 1 part Redline shockproof gearoil with excellent results. Shift's like butta even at high revs. I also use Redline in my T-case and rear diff. Use the best, get the best results.

I'm thinking about trying the same thing. Do you use lightwieght or heavy shockproof?

[Rip Tahoe]

Heavy shockproof in old beat up trans.

Light weight for rebuilds.

[shott17]

Originally Posted by cupa-joe

I'm thinking about trying the same thing. Do you use lightwieght or heavy shockproof?

You have a better chance at seeing Jesus, then haveing Rippin answer you any time soon.

He has been inactive quite some time now. I wish he would come back and pwn some soul for old times sake. But alas. You noobs around here are getting off easy.

Im sure even he would come in here and say "way to dig up a 3 year old thread."

[1QuickChic]

Originally Posted by shott17

I wish he would come back and pwn some soul for old times sake. But alas. You noobs around here are getting off easy.

Im sure even he would come in here and say "way to dig up a 3 year old thread."

soooooo

Rippin one request

[cupa-joe]

Alright. Thanks guys

[thewraith]

heavy for rear dif and t-case and lightweight for tranny. I would just go with the synchroshift or synchromesh in the tranny personally.

[jtyler]

I just replaced all my fluids. I used Pennzoil Synchromesh for the transmission & Coastal 75w90 synthetic for t-case and rear differential.

I might try a different transmission fluid as the synchromesh doesn't seem all that great.

[BuiltGsx253]

Originally Posted by Stephen

I recently purchased Bg Synchroshift 2 full synthetic from www.roadraceengineering.com for 48$ for 3 quarts as opposed to 3 quarts of regular BG synchroshift for 29$ Being the fourth fluid ive tried I figure I would share my experiences and opinions for new dsm'ers.

I have tried various transmission fluids in my car up to this point being an owner for 6 years and hope my experiences can help people out. The only information I will be unable to give is cold weather testing because I store my car during the winter months.

Penzoil:
The most recent was Penzoil synchromesh, which I have to say for the cheap price and autozone availability is a nice gear oil for short term. the transmission was very smooth with this fluid initially, but it seemed to wear fast. on a very hot day two months ago I ran into a problem while driving my car for about 5 hours straight where it did not want to go into first or third and fourth. It was not a clutch engagement issue, I believe the oil was just breaking down under the stress. It was about a year old with 10k miles on it. I had put this oil into my car as well when i installed the 6bolt 15k before that. I do recognize that my third gear has deteriorated in these last few years due to wear, age and power output of the car, and it has started giving a lil gear rub going into third over 7k. Some of this might even be attributed to the oil.

Mobil 1:
Before that I had Mobil 1 full synthetic gear oil, which is a nice gear oil, and I never had any problems with it besides it did nothing for the notchiness of my transmission. It was readily available at autozone so i gave it a shot to replace my aging Bg synchroshift 1. For the price I would not recommend this fluid for people who like to switch gears quickly and smoothly, although it seemed to protect and wear well.

BG synchroshift 1:
Bg synchroshift 1 I installed in my car twice and I never got a good read on it, at the time I was plagued by clutch engagement issues for two years due to faulty clutch components. I never really got a feel for the jokingly proclaimed "transmission rebuild in a can." However I have to state that for about a year I drove on a badly damaged clutch and would force the transmission basically clutchless into 1st through 5th MANY times with no immediate damage which i attribute to this fluid.

Bg synchroshift 2 Full synthetic.
I have had this fluid in my car for a little while now and have to say it is definately worth the extra money! The transmission does not feel like it has 138k(40k modded)miles on it. Every gear is smooth and notchless and the transmission feels fantastic shifting into each gear including my bitchy 3rd gear at over 7000rpm. After hours of driving the fluid does not fatigue like the penzoil and driving is certainly more enoyable. Now if this fluid keeps this up for 15-20k of mileage and protects like I know Bg synchroshift 1 does, I will be convinced that this may be the absolute best transmission fluid for our cars.

Gm Synchromesh:
I have never used this fluid, however I have read and heard that this stuff is comparable to Bg synchroshift 1 at a lower price. I hope someone will add on to this thread their experiences with it.

Conclusion:
for a short term goal, for example: if you know your going to be changing the fluid often or the transmission is on its way out or you are breaking the transmission in and will change the fluid shortly I would use penzoil synchromesh. If you plan on sticking it out with the transmission or dont expect to service it soon I would at least go with Bg synchroshift 1 and if you are the "only the best for my baby" kind of guy/gal like myself I would pay the extra and get BG synchroshift2.

i currently use gm synchromesh and it works great, shifts perfect.

[draculia]

Wow, old thread. I personally use shockproof in all, light in tranny, and heavy in tcase and rear. I've done this for about 6 or 7 years. Tranny still shifts like when I first got the car.

Back in the day people would say not to run shockproof with synchros. When I spoke to Redline about it they simply said that if its not notchy with it, then it'll be fine.

[Asmodeus]

I cut BG II w/ HWSP. 2qts BG II 1qt HWSP.

I use Mitsu's own LSD Diaqueen in the T/C and Rear, both cut with 25-30% HWSP.

And I run it year round without issue.

[Morpherex]

What is HWSP?

[bzerkkiller]

Good Write-Up

I currently have BG Synchroshift II

[turbosteve]

I personally run a 50/50 mix valvoline 80/90 and coastal 80/140 weight. It works very well. I drains out clean. I did alot of research on tranny fluids, and alot of it comes down to making sure all of your shifting mechanics (clutch adjustment,pivot ball,cable adjustment) is all in good working order.

8k off the rev limiter shift, goes right in like butter. I change my fluid every 2 oil changes or so, just because it cost 10 bucks, so why not?!

gt42+2.4+laser+launching+

[turbosteve]

Here is some other great info

http://www.bestoil4you.com/files/g2457GearLube.pdf

Most gear oil now adays has anti corrosion additives. Which interm does not harm syncros over time. Im not 100 percent sure, but im pretty sure when you see "gl5 mt1" it has those anti corrosion additives in it.

[Stephen]

1. I love your car.
2. Do you lift to shift?