Advice on Transmission and Differential Fluids.
Thread Starter
Registered User
Joined: Jan 2010
Posts: 352
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From: Philadelphia, Pa.
For transmission i used gm synchromesh and it works great. i read the reviews for it on here and people loved it. made my tranny smooth and all the knotchy-ness was gone. for the diff i used valvoline 75w-90, but heard great things about redline and amsoil.
best in my opinon.
engine oil
1) amsoil
2) royal purple (even tho its over rated now)
3) castrol edge
-i never run mobile one anymore. my ap1 burns oil a LOT of mobile one, like a quart 1200 miles.
transmisson fuild
1) gm synchromesh
2) redline
3) honda mtf
rear diff
1) redline
2) amsoil
3) LE Almasol
best in my opinon.
engine oil
1) amsoil
2) royal purple (even tho its over rated now)
3) castrol edge
-i never run mobile one anymore. my ap1 burns oil a LOT of mobile one, like a quart 1200 miles.
transmisson fuild
1) gm synchromesh
2) redline
3) honda mtf
rear diff
1) redline
2) amsoil
3) LE Almasol
For the rear differential, would you recommend 75w90? I was planning on using Mobil 1 for the differential and oil but I think I'm going to go a different route this time around after reading up on it more? Thanks for your recommendations it has definitely helped me throughout the process!
Joined: Aug 2010
Posts: 4,385
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From: um, a house
Just to add my fuel to the fire so to speak...'03 AP1, 38,000 miles.
engine oil- 10w30 amsoil signature synthetic
transmission- amsoil syncromesh
differential- 75w90 synthetic mobil 1 or castrol 75w90 synthetic- has to be LSD compatible
brake- DOT 3 amsoil brake fluid
at 30k miles, just replace all of those. Plus, based on your time, not mileage, replace the spark plugs with OEM recommended.
As an aside, my amsoil dealer also has a marine grade synthetic 10w30 which cost just a little more than the amsoil signature...it apparently has more stuff in it as boats typically sit around more- no idea if its any better than the automotive equivalent.
good luck.
darcy
engine oil- 10w30 amsoil signature synthetic
transmission- amsoil syncromesh
differential- 75w90 synthetic mobil 1 or castrol 75w90 synthetic- has to be LSD compatible
brake- DOT 3 amsoil brake fluid
at 30k miles, just replace all of those. Plus, based on your time, not mileage, replace the spark plugs with OEM recommended.
As an aside, my amsoil dealer also has a marine grade synthetic 10w30 which cost just a little more than the amsoil signature...it apparently has more stuff in it as boats typically sit around more- no idea if its any better than the automotive equivalent.
good luck.
darcy
Thread Starter
Registered User
Joined: Jan 2010
Posts: 352
Likes: 0
From: Philadelphia, Pa.
Just to add my fuel to the fire so to speak...'03 AP1, 38,000 miles.
engine oil- 10w30 amsoil signature synthetic
transmission- amsoil syncromesh
differential- 75w90 synthetic mobil 1 or castrol 75w90 synthetic- has to be LSD compatible
brake- DOT 3 amsoil brake fluid
at 30k miles, just replace all of those. Plus, based on your time, not mileage, replace the spark plugs with OEM recommended.
As an aside, my amsoil dealer also has a marine grade synthetic 10w30 which cost just a little more than the amsoil signature...it apparently has more stuff in it as boats typically sit around more- no idea if its any better than the automotive equivalent.
good luck.
darcy
engine oil- 10w30 amsoil signature synthetic
transmission- amsoil syncromesh
differential- 75w90 synthetic mobil 1 or castrol 75w90 synthetic- has to be LSD compatible
brake- DOT 3 amsoil brake fluid
at 30k miles, just replace all of those. Plus, based on your time, not mileage, replace the spark plugs with OEM recommended.
As an aside, my amsoil dealer also has a marine grade synthetic 10w30 which cost just a little more than the amsoil signature...it apparently has more stuff in it as boats typically sit around more- no idea if its any better than the automotive equivalent.
good luck.
darcy
I plan on switching over to Amsoil oil from Mobile 1 as that seems to be a popular motor oil and I have really nothing to lose; however, what makes Amsoil better then Honda MTF and what makes Mobil 1 or Castrol better then Amsoil for Differential fluids?
Sorry for all the questions guys, I really enjoy your input and want to make the best decision rather then the fastest decision, also I love feedback and some debate
Spammer
Joined: Dec 2010
Posts: 248
Likes: 1
From: Canmore, AB
Don't forget about the brake fluid. I remember reading in the manual that on low use vehicles this should be changed out every 3 years without regard to the few number of miles actually driven. Based on my reading, for the engine oil, if you were intent on going to go to a synthetic, Amsoil would be my choice - my $0.02.
Thread Starter
Registered User
Joined: Jan 2010
Posts: 352
Likes: 0
From: Philadelphia, Pa.
Don't forget about the brake fluid. I remember reading in the manual that on low use vehicles this should be changed out every 3 years without regard to the few number of miles actually driven. Based on my reading, for the engine oil, if you were intent on going to go to a synthetic, Amsoil would be my choice - my $0.02.
Registered User
Joined: Oct 2010
Posts: 1,944
Likes: 7
Originally Posted by s2cho' timestamp='1326684301' post='21320034
For transmission i used gm synchromesh and it works great. i read the reviews for it on here and people loved it. made my tranny smooth and all the knotchy-ness was gone. for the diff i used valvoline 75w-90, but heard great things about redline and amsoil.
best in my opinon.
engine oil
1) amsoil
2) royal purple (even tho its over rated now)
3) castrol edge
-i never run mobile one anymore. my ap1 burns oil a LOT of mobile one, like a quart 1200 miles.
transmisson fuild
1) gm synchromesh
2) redline
3) honda mtf
rear diff
1) redline
2) amsoil
3) LE Almasol
best in my opinon.
engine oil
1) amsoil
2) royal purple (even tho its over rated now)
3) castrol edge
-i never run mobile one anymore. my ap1 burns oil a LOT of mobile one, like a quart 1200 miles.
transmisson fuild
1) gm synchromesh
2) redline
3) honda mtf
rear diff
1) redline
2) amsoil
3) LE Almasol
For the rear differential, would you recommend 75w90? I was planning on using Mobil 1 for the differential and oil but I think I'm going to go a different route this time around after reading up on it more? Thanks for your recommendations it has definitely helped me throughout the process!
If you have colder weather definitely get 5w-30. But if you live in a warmer place 10w30 will be fine. For the rear diff I would get 75w90, and amsoil is great for the diff. Word of advice is WEAR GLOVES! diff oil smells sooo bad and it will stick around your hands for a while. redline doesnt smell at all and works great so people love it. but you cant go wrong with amsoil.
Joined: Oct 2009
Posts: 3,194
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From: South Carolina
Going to weigh-in and say I LOVE GM Syncromesh Transmission fluid, and echo 75w-90 for the diff. Those are the best in my experience. I've used the older and newer Honda MTF variants, and the GM Syncromesh feels a tad smoother. It's such a small difference that it may all be in my head, but I digress. Honda MTF is obviously very good as well.
haha
Registered User
Joined: Oct 2010
Posts: 1,944
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Going to weigh-in and say I LOVE GM Syncromesh Transmission fluid, and echo 75w-90 for the diff. Those are the best in my experience. I've used the older and newer Honda MTF variants, and the GM Syncromesh feels a tad smoother. It's such a small difference that it may all be in my head, but I digress. Honda MTF is obviously very good as well.
i LOVE IT TOO! And think its smoother than honda mtf too! both are great and you cant go wrong.