I just bought a good used trans with low miles and want to replace the gasket with a rubber one and change the fluid. Whats the best fluid for performance, longevity, and heat protection? I don't want to spend $9 a quart on that synthetic B&M Trick Shift crap, but I want something thats better than the average ATF,

Recommendations appreciated

 

www.amsoil.com

 

man.... when i get the new tranny in and have to fill that thing up i dont think i can afford 100+ dollars and shipping just for tranny fluid. amsoil sounds great, but i just dont think that 10 bones per quart is worth it. i think i might try mobile one, its synthetic, i can buy it at a regular store, and the only person that ive ever heard say bad stuff about it is fiv7kid. no offense fiv7, but you are an amsoil dealer so you are going to push the product... just my 2 cents.

 

try mobil1. It's a synthetic. I've never heard anything bad about mobil1.

 

i use mobil one synthic trans fliud, i aslo bhad b+M trany fliud. the mobil one p[rotects more. doesn't shift as hard but sjhiftes smoother t low trotle.

m,y th700r4 s on its way out, i have a raptor tranny awaiting, and i planon using amsoil. it is the best whenm it come to oil, and fliuds. no body comes close.

 

Then you haven't listened to Dana at ProBuilt. And, I have a fellow racer who's gone through 3 trannys each of the last 2 seasons (maybe it's 3 seasons now, time flies) who insists on using Mobil 1 ATF.

$100 for fluid in a $1200 tranny sounds like a bargin to me.

 

my tranny is only gona cost me 300-400 to build(no labor), and for all we know your friend is putting way more power through that trans than it can handle amsoil or not. i just would like to hear a lot more negative comments about mobile one ATF b4 i rule it out. i have heard far more positive things about it than bad.

 

Think of it another way - Spend $100 to avoid spending $1200 rebuilding the tranny - or do a couple more $300-$400 replacements.

Yes, this guy is putting out a lot of power. But, his car weighs over 1000 lbs less than another racer who is .5-sec slower, who goes multiple seasons on his tranny (no, doesn't use AMSOIL - yet).

Give Dana a call. He'll tell you to use regular Mobil Dexron rather than Mobil 1 ATF.

 

has anyone had any experience with the redline transmission fluid?

 

Redline is a good fluid also.

 

I beat the snot out of my TH700-R4 on road courses for two seasons, changing fluid at the end of each season. Before that, I beat the snot of out it drag racing for a year. I sold it still working when I took the plunge to T-56 bliss.

This was a used '88 trans, just popped in a Fairbanks servo and Trans-Go shift kit as well as a big-azz external cooler.

Chalk me up as a very happy Amsoil customer, both engine oil as well as trans fluid.

 

well we all agree that amsoil is probably the best..... but i just want to hear negative stuff about mobile one for some other people..... pro built what do you think?

 

It has been a couple of years now, since I have seen any units using Mobil One, before that I did not like what I saw. I cannot say if it has improved (personally), but from what others are saying (here & other boards), it sounds like it has gotten better.

 

so u can allways look at it like this-
it it only cost me 400 to build, i'm still saving money when comparing it to a 1200 tranny, so you can rebuild it 3 times before you decide on doing it the best way.

or look at it the smart way-
build it for 400, i'm still saving when compared to a 1200 tranny, but now spend 100 on atf, so u don't have to rebuild it in a year.

save your self 300 in the long run ,for what to save 60 now. why??

 

well im not sold either way.... i just want to hear ACTUAL experiences, not just hear say.

 

On that basis, you will never be convinced. You've got "actual experiences" related above, what more do you want? http://www.amsoil.com/products/atf.html gives standarized testing results for AMSOIL ATF. http://dallnd6.dal.mobil.com/GIS/Mob...b?OpenDocument has the product data sheet for Mobil 1 ATF. Similar data is available on www.redlineoil.com.

Does that help you make a decision? Probably not, because they don't report the same things, and standarized tests don't tell the whole story. It sounds more like you want everyone to agree with what you're doing, but you're going to do what you want to do anyway. So, go do it.

BTW, I'm not "pushing" anything. I'm recommending something. I make my living as a rocket engineer, I'm an AMSOIL dealer so I can do more of my hobby with less money. I don't see regular rebuilding of engines, transmissions, and differentials as a way to get more out of my hobby for the money I have available for it.

 

can't a softer shifting tranny (as someone said that mobil1 will give you) be harder on the tranny due to the clutches slipping?

 

no because, softer shifting is due to a heavy fluid. hard shifting is due to a lighter fluid. its kinda like oil.
i have had
mobil one- soft shifts
B+M- rock solid shifts

my best friend has had redline and this car also shifted pretty hard- before that he had mobil one and it shifted softer.
i dunno which is shifts firmer(redline+B+M) they were in to differnet trannys.

my cousin has 128K on his tranny in his 84 camaro, and u could feel the ranny slippin, then my father told him about amsoil and it went away, that was at about 85k.

 

well im actually looking into that amsoil stuff and i may try it, if i get the trial prefered customer deal, i could get all the ATF i need and some motor oil and rear gear lube as well, im going to be needing all that stuff at the begining of the season anyways. maybe ill just give it a whirl. what is the difference between the different engine oils 7500 and the 100% syn for instance. also the diferences w/ gear oil..... thanks

 

I was wondering the same thing, Im going to be changing my fluid soon and add a cooler. I got this stuff at work Trans-X Syn Blend trans fluid looks to be good stuff. I know there "Mechanic in a Can" is gr8 stuff I used that on alot of my vechiles when they started to slip and it just cleared it up. So im thinking of going the Syn. Blend way when changing the fluid ill let ya's know how it turns out.

 

The XL-7500 is 100% synthetic. It's formulated for the quick-lube business, promising a 6-month/7500 mile change interval (a little less than twice the cost for half as many oil changes, plus the reduced wear and deposit qualities of synthetic). It is a little lower priced than the other synthetics, although you don't really get into much savings at the quart level - 55 gal drums, another story. It basically has a little lower TBN (total base number - acid neutralizing property).

The Series 2000 gear lube is their latest formulation. Especially nice with posi, because you will not have to add the friction modifier. With the other type, the additive is sometimes required (although probably less than 10% of the time).

 

Not really true. It has to do with the engagement rate of the clutch packs. Softer means either cushioned shifts, or gently slipping together. A harsh shift can also be evidence of the sudden stopping that components have to perform as it goes from one range to another.

B&M doesn't have the friction modifiers in it. So, the clutch plates grab on to each other immediately, rather than ssslllliiiddding together. That isn't always good, though.

If you want the anti-wear and anti-oxidation properties of AMSOIL ATF with the instantaneous shift properies of B&M, try the Supershift fluid (also happens to cost less). Fair warning - they specifically say "...not recommended as a replacement for Ford Mercon, GM Dexron or Chrysler ATF+ type fluids in passenger vehicles and truck transmissions as it may cause erratic shift patterns, chattering or noise. AMSOIL is not responsible for transmission performance inconsistent with those specifications listed, where no modifications have been made from the original manufacturer’s design." I have it mixed 50/50 with the normal synthetic ATF in the '57, and the shifts are amazingly quick. "Normal" driving, it rattles the entire car when it shifts.

 

so the atf doesn't have anything to do with how hard it shifts
, so it doesn't realy matter what atf u use. then why did my tranny start to shift alot smoother and softer when i changed atf

 

Every transmission will change how it shifts with different fluid, the point is, is to use the best quality fluid possible to get the longevity you want, then install a valve body kit (Trans-Go) Corvette servo, and boost valves, to obtain the firmness you want.

 

so would Mobil 1 be better then a non-synthetic trans fliud? I just got my trans rebuilt--but not back in the car.

Will it operate at cooler temps with synthetics?

 

yeap