Tranny Oil advise on STi 6MT - Page 3

Stee · 01-19-2006, 02:43 PM

I ran Silkolene Syn 5 in my tranny and Silkolene BOA 90 LS in my rear diff for 15,000 miles on my 2004 STi. No problems at all and shifted perfectly. It's the only synthetic gear oil I would use in my car.

Latesleeper · 01-20-2006, 03:32 AM

I just had 2 liters of Subaru 90W LSD oil delivered yesterday. I'll have an extra bottle on hand for another rear diff change. Thank goodness for this informative thread.

**Wazazell** · 01-20-2006, 06:03 AM

Quote:

Originally Posted by Latesleeper

I just had 2 liters of Subaru 90W LSD oil delivered yesterday. I'll have an extra bottle on hand for another rear diff change. Thank goodness for this informative thread.

Please post the Subaru part number!! Thanks!

91TB78 · 01-20-2006, 06:14 AM

Quote:

Originally Posted by Wazazell

Please post the Subaru part number!! Thanks!

Rear diff oil - 1-1.2qts Mechanical LSD oil (Part No. K0305Y0900)(75W-90 GLS) $18.19 @ subaruparts

Enjoy. I only bought 1 liter for my change.

rankink75 · 01-20-2006, 07:11 AM

I am about to purchase the Subaru rear diff fluid for a change myself. I did happen to find valvoline 75w90 non-synthetic at a Napa in my area and replaced that on Monday. Went very well and no problems after a week of driving. I changed it out at 16,200 miles on my 05 STi and the oil was not black yet, but just that really dark gold. This is with autocrossing it hard the whole last year I have had it. The tranny fluid change is quite easy except for getting the oil into the tranny. Not much room for the bottle to fit into the filler hole.

91TB78 · 01-20-2006, 09:02 AM

rankink,
I'm planning the exact same with about the same mileage. I am in no hurry since I know that I'm probably good until about 30K. I may hold onto the tranny oil and diff oil and do it come spring before AutoX season.

ChaoticSTi · 01-20-2006, 09:45 AM

the first scheduled tranny oil and rear diff oil change is 30k miles?

I can't find my book and I searched around but couldn't get a for sure answer

thanks

benton0311 · 01-20-2006, 10:11 AM

GearboxTech recommended that I use lightweight shockproof in the transaxle and MT-90 in the rear. I switched per their recommendation and the car drives and shifts smooth as ever.

I figured Gearboxtech/Andrewtech would know what to use as they tear these things apart every day and actually showed me opened up transmissions with the shockproof sticking to the gears and walls of the case.

rankink75 · 01-20-2006, 12:46 PM

Quote:

Originally Posted by ChaoticSTi

the first scheduled tranny oil and rear diff oil change is 30k miles?

I can't find my book and I searched around but couldn't get a for sure answer

thanks

You are correct. 30k, but since I do drive the car very hard I figured it could not hurt.

scrmblr2 · 01-20-2006, 09:05 PM

I used roayl purple gear lube in the diff and the trans at about 12000. I autox, so I fugured, what the heck. Very nice and smooth, just like stock.

01-20-2006, 09:05 PM	#30
scrmblr2 Professional STI Racer Feedback Score: 2 reviews Car: 05 Subaru WRX STi OB My Stuff: Subaru Parts Fav Mod: Protune by Jorge Location: Chi Burbs Posts: 812 IWSTI Addict since: Oct 2004	royal purple I used roayl purple gear lube in the diff and the trans at about 12000. I autox, so I fugured, what the heck. Very nice and smooth, just like stock.

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01-19-2006, 02:43 PM	#21
Stee Spec C Club Feedback Score: 8 reviews Car: 2008 Honda S2000 CR Fav Mod: Sawzalling 41.6 lbs of mufflers off my car Location: North Jersey Posts: 1,539 IWSTI Addict since: Jan 2004	I ran Silkolene Syn 5 in my tranny and Silkolene BOA 90 LS in my rear diff for 15,000 miles on my 2004 STi. No problems at all and shifted perfectly. It's the only synthetic gear oil I would use in my car.

01-20-2006, 03:32 AM	#22
Latesleeper Junior STI Driver Feedback Score: 1 reviews Car: 05 CGM STi Fav Mod: Snow Tires Location: N.E. Ohio Posts: 55 IWSTI Addict since: Jan 2006	I just had 2 liters of Subaru 90W LSD oil delivered yesterday. I'll have an extra bottle on hand for another rear diff change. Thank goodness for this informative thread.

01-20-2006, 07:11 AM	#25
rankink75 STI Driver Feedback Score: 2 reviews Car: 05 Subaru WRX STi Fav Mod: SFSOC / Pastelito Racing Location: Miami Springs, FL Posts: 207 IWSTI Addict since: Mar 2005	I am about to purchase the Subaru rear diff fluid for a change myself. I did happen to find valvoline 75w90 non-synthetic at a Napa in my area and replaced that on Monday. Went very well and no problems after a week of driving. I changed it out at 16,200 miles on my 05 STi and the oil was not black yet, but just that really dark gold. This is with autocrossing it hard the whole last year I have had it. The tranny fluid change is quite easy except for getting the oil into the tranny. Not much room for the bottle to fit into the filler hole.

01-20-2006, 09:02 AM	#26
91TB78 S204 Racer Feedback Score: 12 reviews Car: 06 IX MR Location: Minneapolis, MN Posts: 3,666 IWSTI Addict since: Mar 2002	rankink, I'm planning the exact same with about the same mileage. I am in no hurry since I know that I'm probably good until about 30K. I may hold onto the tranny oil and diff oil and do it come spring before AutoX season.

01-20-2006, 09:45 AM	#27
ChaoticSTi Professional STI Driver Feedback Score: 3 reviews Car: an evo ix Fav Mod: tune Location: Howell, New Jersey Posts: 499 IWSTI Addict since: Sep 2005	the first scheduled tranny oil and rear diff oil change is 30k miles? I can't find my book and I searched around but couldn't get a for sure answer thanks

01-20-2006, 10:11 AM	#28
benton0311 Junior STI Driver Feedback Score: 0 reviews Car: 08 335i Graphite Fav Mod: Subaru delete Location: SW Asia/Maryland Posts: 175 IWSTI Addict since: Jan 2004	GearboxTech recommended that I use lightweight shockproof in the transaxle and MT-90 in the rear. I switched per their recommendation and the car drives and shifts smooth as ever. I figured Gearboxtech/Andrewtech would know what to use as they tear these things apart every day and actually showed me opened up transmissions with the shockproof sticking to the gears and walls of the case.