MR2 Roadster Owners Club

The Workshop => Performance Related => Topic started by: Anonymous on February 11, 2007, 19:26

Title: 6 Speed versus 5 speed
Post by: Anonymous on February 11, 2007, 19:26
basically how should you drive a six speed if you have been used to driving a 5 speed?!

can you readline each gear in the same way as in the five gear box?
Title: Re: 6 Speed versus 5 speed
Post by: ninjinski on February 11, 2007, 19:29
Quote from: "bossman23780"basically how should you drive a six speed if you have been used to driving a 5 speed?!

can you readline each gear in the same way as in the five gear box?

Personally I drive gears 1-5 as I did with the 5 speed (except now I try to drive to my torque curve since having the TTET installed) - 6 in my mind is a motorway cruising or fuel saving gear   s:wink: :wink: s:wink:
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Post by: Anonymous on February 11, 2007, 19:34
has the 6 speed got a slightly higher top speed and when are you supposed to change gear, is it at the same change as with the 5?!

im struggling to understand the gains of a six speed, especially if you chose an SP240 package that would negate the early change because you could keep the power on right up to the readline?!
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Post by: ninjinski on February 11, 2007, 20:00
Not so sure - but mind you would be hitting well over 130mph at that stage in 5th regardless!!!   s:lol: :lol: s:lol:    s:lol: :lol: s:lol:    s:lol: :lol: s:lol:
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Post by: Anonymous on February 11, 2007, 20:10
 s:shock: :shock: s:shock:  

... is that all! you slow coach   s:wink: :wink: s:wink:
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Post by: kanujunkie on February 11, 2007, 20:21
gears 1-5 in a 6 speed box is the same as the 5 gears in a 5 speed box, so you'd drive them the same but when a 5 speed box runs out of gears a 6 speed box still has another
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Post by: red_leicester on February 12, 2007, 01:00
That was almost Spinal Tap-esque Stu!  s:) :) s:)
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Post by: Anonymous on February 12, 2007, 14:43
 s:lol: :lol: s:lol:
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Post by: custardavenger on February 13, 2007, 22:06
I've been thinking about doing the swap myself. I do alot of motorway miles and would love the extra gear but then I love the position of reverse in the five speed.

One question. Does the six speed box have an LSD? sure I read it somewhere.
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Post by: markiii on February 13, 2007, 22:07
all uk roadster boxes have an lsd
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Post by: Anonymous on February 13, 2007, 22:08
All UK   EU gearboxes do. Jap  US ones had it as an option.


*EDIT* Too slow  s:( :( s:(
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Post by: kanujunkie on February 13, 2007, 22:09
all uk spec cars have an LSD

iirc the LSD is seperate from the gearbox anyway, but dont quote me 100% on that
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Post by: Anonymous on February 13, 2007, 22:13
Still, not as slow as Stu  s;) ;) s;)
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Post by: kanujunkie on February 13, 2007, 22:33
ya buggers  **shakes fist in the air**

  s:wink: :wink: s:wink:
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Post by: aaronjb on February 13, 2007, 22:38
Quote from: "kanujunkie"iirc the LSD is seperate from the gearbox anyway, but dont quote me 100% on that

It's inside the same casing, but it's not really part of the 'gearbox', if you see what I mean..  You can change it without having to dismantle drive gears, but it's not exactly an operation for the novice IIRC.
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Post by: mrsmr2 on February 14, 2007, 17:16
Toyota only really mentioned the LSD when the facelift was released hence a lot of people quote it arrived with the 03s.

However, the LSD has always been there.
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Post by: custardavenger on February 14, 2007, 17:45
Cheers guys. So are you saying I've got one then. LOL.

So am i right to believe it's got it's own oil cavity? Hmm maybe thats where the oil is leaking from.
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Post by: Tem on February 15, 2007, 04:27
Quote from: "custardavenger"So am i right to believe it's got it's own oil cavity? Hmm maybe thats where the oil is leaking from.

LSD is inside the transmission, it's using the same oil with it.
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Post by: custardavenger on February 15, 2007, 17:49
Quote from: "Tem"
Quote from: "custardavenger"So am i right to believe it's got it's own oil cavity? Hmm maybe thats where the oil is leaking from.

LSD is inside the transmission, it's using the same oil with it.

Yeah. just had a look at it in the manual. Guess I'll split the box when I do the clutch/flywheel.

Ta
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Post by: Anonymous on February 17, 2007, 06:32
Quote from: "custardavenger"
Quote from: "Tem"
Quote from: "custardavenger"So am i right to believe it's got it's own oil cavity? Hmm maybe thats where the oil is leaking from.

LSD is inside the transmission, it's using the same oil with it.

Yeah. just had a look at it in the manual. Guess I'll split the box when I do the clutch/flywheel.

Ta
The clutch and flywheel are accessible when the transaxle has been separated from the engine.
The differential is not.
Based on your post I'd warn you off going in past replacing the clutch.
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Post by: custardavenger on February 18, 2007, 20:00
Don't worry WTS, I've done a couple of gearboxes before and though I don't know much about the 2's box now. I'll do my homework before I start.

Can't just ignore an oil leak.
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Post by: spit on February 18, 2007, 22:09
Dumb question of the day:

How do you determine whether a 'box (off the car) is 5 or 6 and if it has LSD? They all look the same to me  s:? :? s:?
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Post by: Tem on February 19, 2007, 04:31
Quote from: "spit"How do you determine whether a 'box (off the car) is 5 or 6 and if it has LSD? They all look the same to me  s:? :? s:?

See if you can find 5 or 6 gears (and reverse) with the selector shaft?  s8) 8) s8)
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Post by: Anonymous on February 19, 2007, 07:39
Reverse is opposite on them.

5sp is away from the driver and back.
6sp is towards the driver and forward.
Of course, over there its just the opposite from that.
5sp will be towards the driver and back.
6sp will be away from the driver and forward.

If its out of the vehicle its tricker as they share housings. All 6speeds will have "C60" stamped in multiple places but so will the 5sp. However, on the USDM 5SP theres a "C15" on the outside wherease the 6sp has C60 in the same spot.

You can also compare shift selector shaft housings if you know what at least one of them looks like.

For the LSD they only sure way short of disassembly is to look thru the transaxle from the axle holes. If you can see daylight then no LSD. If its completely blocked its because of the LSD.

The method where one puts both wheels in the air and spins one of them doesnt always provide conclusive results. Sometimes both wheels will spin the same way sometimes they wont. Depends on whether the LSD requires some torque difference in order to 'engage'.
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Post by: philster_d on February 19, 2007, 12:30
So does the 6 have a higher final drive ratio or not ?
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Post by: Anonymous on February 19, 2007, 17:28
This is my understanding of the final drive ratios.
Euro 6SP has a higher ratio (lower numerically) of 3.94
IDK what the Euro 5SP is.
USDM 6SP is lower (higher numerically) at 4.5
USDM 5SP  4.31 MR2
USDM 5SP 3.94 '03+ Corolla
USDM 5SP 3.7X '98-'02 Corolla.

A 3.7/3.94 FD in an N.A. car will be slower off the line and generally not as fun to drive as a 4.3 or 4.5 but is excellent for a turbo car.

Final ratios are not swappable between 5sp and 6sp but you can swap 5 to 5 and 6 to 6.Over here theres at least one turbo owner thats using the spyder 5SP gears with the pre-2003 Corolla final drive.