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Just a short question. I have only just recently moved to Adelaide from Brisbane and the driving I do has gone from highway to city. If I have the 2.75 ratio in the ute now what would be the better ratio to replace it. Keep in mind i have been down here for over a month and have not got up to 80kms yet. Is 3.55 as far as they go in a 10 bolt or do they go further? How easy is it to get ahold of these ratio's? Has anyone got one for sale?
Cheers Chris
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Hi Chris.
What car, what engine (any mods) & what gearbox.
All of these have a huge bearing on the answer.
Dr Terry. |
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I'm going to make an assumption that its HQ in your avatar...but you would still need to provide the detail the Dr. asked for.
I beleive they go to 4.44:1 in the one tonners?
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Sorry didn't think. It's a HX Styleside ute, 308 T400. As far as I know the motor is standard, just reconditioned a short while ago I was told.
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Hi Chris.
A 2.78 or 3.08 is good for a 308 TH400 combination. HX, HZ & WB Statesmans use a 2.60 diff no problems. A lower diff ratio is only required if your motor doesn't have enough low down torque to get you you car going at low speeds or if you hav |
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Hi Terry, I seem to recall we discussed this late last year? Styleside = normal ute (as opposed to a tonner). Stepside = What the yanks call a pickup. Trayback = Tonner style. BTW, I'd reckon a 3.36 or taller (lower numbered) diff would be Edited by user Friday, 30 June 2006 10:07:49 PM(UTC)
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Hi Dave.
I remember part of the conversation, but I thought a stepside was where they had the narrow ute body & protruding guards like a box trailer but more rounded.
These are Yank terms that really don't apply here, our utes are officially called |
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I thought the body with the guards sticking out etc was a styleside, the ordinary ute bodies were well bodies, and the tonner type was a traytop.
personally i don't like the term pickup, Australia invented the ute and called it a utility, so why not go w
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That was the other term for a "normal" Aussie ute that I couldn't think off earlier...a well-body. Thanks John.
You are spot-on in your description of a stepside Terry.
The term Styleside was actually used by GMH and Ford in the 30's to describe the
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3.08 would be the best diff ratio. Good cruise rpm, will pick up a little performance, and maybe some fuel economy.
If you go any lower(higher numericly)with a std stall convertor, then you just loose torque multiplication in you convertor. Won't hurt an
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Years ago I replaced the 3.08 in my Torana (202 red with Opel box)with a 2.78 LSD. I left it there for only a month or two before swapping back to 3.08. Fuel consumption increased 10%, top speed reduced 10%, pick-up reduced 10%, and I had to run in lower
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Hi David.
That's what I meant when I said,
"A lower diff ratio is only required if your motor doesn't have enough low down torque to get you you car going at low speeds".
A stock 202 manual will not have enough torque to 'push' the 2.78 diff, |
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Hi Dr Terry,
A few weeks ago a bloke was flogging a 2.78 LSD on ebay. His claim was that it improved fuel economy (by reducing revs) behind his heavily worked 186 with 4-speed in Torana. I guess he sold it - I didn't follow it. I wonder what the purcha
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I would suggest even a 202 would have trouble with a 308 ratio. A 336 manual or 355 auto runs ok with them.
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