tranny oil swap
#1
tranny oil swap
hey guys, i heard threads talking about how changing the tranny oil makes shifting much smoother. So i bought 4 bottles of royal. (dont worry, did my reasearch, pretty sure i got the right type). The thing is i dont kno how to change this oil, yea yea, being a girl sucks. Should any mecahnic know how to do this, at a jiffy lube or something??. If so, how mouch would they charge me, and would they know how to do it correclty. i.e thats its actually a little less than the 4 quarts. thanks
#2
The Professor
Originally Posted by rx8gurl
hey guys, i heard threads talking about how changing the tranny oil makes shifting much smoother. So i bought 4 bottles of royal. (dont worry, did my reasearch, pretty sure i got the right type). The thing is i dont kno how to change this oil, yea yea, being a girl sucks. Should any mecahnic know how to do this, at a jiffy lube or something??. If so, how mouch would they charge me, and would they know how to do it correclty. i.e thats its actually a little less than the 4 quarts. thanks
There are 2 big bolts on the transmission 21mm I think, First unbolt the top one, then, unbolt the bottom one and the tranny fluic comes out of the bottom one. Replace bottom bolt, then using a length of hose and funnel or a pump just fill it back up till it begins overflowing out of the top hole.
Differential Fluid is the same.
The bolts on the tranny are on the drivers side of the transmission. The bolts on the Differential are facing the rear of the car if I remember correctly.
If you have the right tools you could do it in your garage in about an 45 minutes.
If you take it somewhere its likely to cost you $80-$100. And you will not know if they didn't fill it enough, or filled it too much.
#4
2 bolts:
drain bolt is a 23mm
fill is 24mm
and it holds almost 3 redline bottles of fluid
Just did mine and also do the diff why you are at it
takes 1.4 bottles of redline.
-Ryan
drain bolt is a 23mm
fill is 24mm
and it holds almost 3 redline bottles of fluid
Just did mine and also do the diff why you are at it
takes 1.4 bottles of redline.
-Ryan
#5
I wanna rock! Rock!
Join Date: Jun 2005
Location: Monterey, CA
Posts: 576
Likes: 0
Received 0 Likes
on
0 Posts
This would make a good DIY thread if there isn't already one.
I think I'll be changing trans and diff fluids for my next 'mod' :o
I just can't find a place that sells Royal Purple around here so I might be using Mobil 1
I think I'll be changing trans and diff fluids for my next 'mod' :o
I just can't find a place that sells Royal Purple around here so I might be using Mobil 1
#6
There is a DIY already.
Once you can get under your car, it's almost self-explanatory. Drain from the bottom bolt hole, fill from the top till it drips out. You will need plastic tubing and a funnel, or better yet plastic tubing and a little hand pump from Northern Tool or whoever (like $5 or something).
The difference is immediate BTW, you feel it before you even start up your car. It's probably the most cost-effective "mod" you can do, heh. Mazda recommends changing oil after the break-in period, they really should recommend the same for the transmission oil.
Once you can get under your car, it's almost self-explanatory. Drain from the bottom bolt hole, fill from the top till it drips out. You will need plastic tubing and a funnel, or better yet plastic tubing and a little hand pump from Northern Tool or whoever (like $5 or something).
The difference is immediate BTW, you feel it before you even start up your car. It's probably the most cost-effective "mod" you can do, heh. Mazda recommends changing oil after the break-in period, they really should recommend the same for the transmission oil.
#7
Mulligan User
iTrader: (1)
DIY tranny/diff fluid swap thread:
https://www.rx8club.com/series-i-do-yourself-forum-73/diy-transmission-differential-fluid-replacement-35115/
there's A LOT of neat stuff in the DIY section, use it!! :p
https://www.rx8club.com/series-i-do-yourself-forum-73/diy-transmission-differential-fluid-replacement-35115/
there's A LOT of neat stuff in the DIY section, use it!! :p
#8
Metatron
iTrader: (1)
HUGE difference......
There is a great difference to the shifting if you use 2 jugs of Redline 90 weight gear oil, then top it off with Redlines' MTL, which is a lot thinner.
Smoother, less crunchy in the cold, slicker shifts at all times, and silent.
"Hear me now, und believe me later!"
Hans und Franz.
S :D
Smoother, less crunchy in the cold, slicker shifts at all times, and silent.
"Hear me now, und believe me later!"
Hans und Franz.
S :D
#10
Oil Injection
Ill be doing the switch to syn in the next few weeks (8k miles) in the miata it made a noticable differnce, esp in the diff, the LSD got a lot better engagement
#16
Registered
iTrader: (3)
all good advice BUT remember to loosen the TOP bolt 1st. Just in case. I have seen someone remove the bottom bolt 1st and the oil is draining(slow but draining) and then COULDNT get the top bolt off. So they where stuck with a trans with no lube in it! Or diff as the case may be.
olddragger
RG synthetic prowler?lol
olddragger
RG synthetic prowler?lol
#17
No respecter of malarkey
iTrader: (25)
Originally Posted by r0tor
the diff calls for 90W and the tranny calls for 75W90
anyone see a problem just sticking a 75W90 synthetic gear oil in each (i believe the diff does not call for any special additives)?
anyone see a problem just sticking a 75W90 synthetic gear oil in each (i believe the diff does not call for any special additives)?
also note that the trans lube spec is GL-4 and the diff fluid is GL-5 spec, many 75W90 gear lube oils are GL-5 spec and my experience is that the synchros don't work as well with GL-5 oil.
Mazda also released a TSB allowing multi-weight GL-5 oils for the diff
http://www.finishlineperformance.com...4-03-1268a.pdf
the RX-8 LSD is a Torsen, it does not require additives, additives are typically for clutch pack LSD's
#18
Registered
iTrader: (1)
Join Date: May 2003
Location: PA
Posts: 3,754
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by TeamRX8
also note that the trans lube spec is GL-4 and the diff fluid is GL-5 spec, many 75W90 gear lube oils are GL-5 spec and my experience is that the synchros don't work as well with GL-5 oil.
Mazda also released a TSB allowing multi-weight GL-5 oils for the diff
http://www.finishlineperformance.com...4-03-1268a.pdf
the RX-8 LSD is a Torsen, it does not require additives, additives are typically for clutch pack LSD's
Mazda also released a TSB allowing multi-weight GL-5 oils for the diff
http://www.finishlineperformance.com...4-03-1268a.pdf
the RX-8 LSD is a Torsen, it does not require additives, additives are typically for clutch pack LSD's
thanks for sharing your experience
#20
Out of NYC
iTrader: (1)
Originally Posted by K1nG
i just had it done by rosenthal... how many quarts were they supposed to use of each (trans + diff)? because they used like only 2 quarts of each and i have 3 leftover bottles and im just wondering why they werent used?
You do the math, 2 Each is about right.
Thread
Thread Starter
Forum
Replies
Last Post
BigMikeATL
RX-8's For Sale/Wanted
12
05-26-2016 12:31 AM
WingleBeast
Series I Wheels, Tires, Brakes & Suspension
22
05-23-2016 09:22 PM