High zinc 5w30 for the transmission?

[Ondonti]

Wondering about filling the trans with proper lube since the green freaks want our transmissions to wear out faster? I know Ramsdell won't back his transmission work unless you run dino 5w30.

[Force Fed Mopar]

I'm running 5w20 dino oil in mine. Works good.

[Ondonti]

its not the same anymore

[Force Fed Mopar]

I know, but it's working Not saying zinc wouldn't be good, but I don't think it's really necessary for trannies. There are millions of 5-spds running around out there w/o with no problems.

[86Shelby]

FWIW I've used Brad Penn 10w30 in my 568, shifted just fine. Not quite as good as GM synchromesh but better than any regular old 5 or 10w30 oil I tried.

[Ondonti]

Read some bad things about synchromesh and as I said, 5w30 is the only lube Ramsdell approves. The 3000gt forums get crazy about lubes and they don oil analysis because they have a much tougher time getting their transmissions to behave.There is a difference between "its fine" and oil analysis fine.

Polygon is actually the person who brought up the subject over there about normal motor oils. THey use special stuff in their transmissions and try all sorts of c0cktails. One of them was scared of new style motor oils in sketchy transmissions.

[86Shelby]

My analysis of the oil was simply how well it would allow me to shift quickly. Regular run of the mill engine oil(tried 4 or 5 different ones) allowed grinding, especially when cold. BP allowed very quick, but not quite powershifting fast shifts at all temps. Synchromesh allows me to powershift it at moderate throttle openings and never grinds; too much resistance in the trans to allow WOT powershifts.

I've heard that those 3000GT guys can get really serious about thier trans lubes.

[shackwrrr]

My analysis of the oil was simply how well it would allow me to shift quickly. Regular run of the mill engine oil(tried 4 or 5 different ones) allowed grinding, especially when cold. BP allowed very quick, but not quite powershifting fast shifts at all temps. Synchromesh allows me to powershift it at moderate throttle openings and never grinds; too much resistance in the trans to allow WOT powershifts.

I've heard that those 3000GT guys can get really serious about thier trans lubes.

I have found the same result with normal oil, 3rd gear grinds for me. I used only synchromesh the first time and it worked great. I then fuggered up an axle and I only had 2 quarts of synchromesh on the shelf, I used a half quart of dex/merc and I think it actually shifts even better than synchromesh alone.


Also I will add my transmission would never grind before I changed the oil after a clutch job. My only guess is that I drained API SL oil (high zinc) and filled it with SM(low zinc).

[Ondonti]

They were suggesting rotella but rotella doesn't have that weight range.

[135sohc]

Add a bottle of the zddp additive ?

[shackwrrr]

Add a bottle of the zddp additive ?

Might work. but the last time I bought a bottle of lucas break in additive it was 15 bucks(1 pint). But I think only a couple Oz of it will bring the ZDDP up to API SL oil levels.

[Ondonti]

Where do you hook up a bottle of that without going online?

[BadAssPerformance]

I've used Redline MTL for years in a number of cars with great results.

Did Cliff build your trans? Ask him?

[turbovanman²]

Synchromesh or like JT said, Redline MTL. I've used both with no issues.

[Force Fed Mopar]

I know a guy that ran syncromesh in a brand new Ramsdell 568 and had it lock up at 1500 miles. Cliff won't warranty it if it has sycromesh.

[turbovanman²]

I know a guy that ran syncromesh in a brand new Ramsdell 568 and had it lock up at 1500 miles. Cliff won't warranty it if it has sycromesh.

That only happened once,

[Force Fed Mopar]

Yeah, was probably a fluke, but if Cliff don't like it...

[shackwrrr]

Where do you hook up a bottle of that without going online?

I got mine at O'reilleys

[glhs727]

Ed Peters (old chrysler failure engineeer) recommends using the HIGH MILEAGE mobil 1 5/30 because it has ZDDP in it.... we use it in all the srt-4 trans we do around here with great success....

[turbovanman²]

Ed Peters (old chrysler failure engineeer) recommends using the HIGH MILEAGE mobil 1 5/30 because it has ZDDP in it.... we use it in all the srt-4 trans we do around here with great success....

That's a good idea.