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G28-03 goodness (78-79 gearbox)

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Old 09-10-2013 | 10:01 PM
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Default G28-03 goodness (78-79 gearbox)

What makes 928 ownership so rewarding is how the car continues to give. It's willingness to do so is a sure sign of depth of character.

My most recent enjoyment is the G28-03 gearbox found in '78 and '79 models.
When working well, it's got just the right everything!

It's a close-ratio box with the gears in all the right places. Combine that with a short 2.75 final drive and you have a trans well-suited for the car it was used in.
It perfectly balances with the power and torque of a well-running 78-79.

2nd gear starts are effortless, for those who prefer a 'standard H' feel (or for those going easy on the 2nd gear synchro).
1st to 3rd to 5th gear is an excellent pleasant surprise for ease of use, when cruising or a on-ramp launch to speed.

I use to pick on the cow femur-like shift lever, but now I find it enjoyable to throw around while always keeping my hands nears the steering wheel.
And I believe the longer throw gives it a good sensitivity or feel for the shift gates.

I just wanted to share one of the things I love about these early 928's. Give one a run sometime!
Old 09-10-2013 | 10:25 PM
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I agree 1000% Jim. I love my gearbox. And I wouldn't think of putting in a short throw. Look at the Carrera GT consol - the gear shift **** is right next to the steering wheel - so is ours; it's just a longer stick because the consol is low. Mine shifts beautifully, and I usually start in 2d. Haven't tried that 1st to 3d yet, but will do so soon!
See you at Frenzy
Old 09-10-2013 | 10:32 PM
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I also agree......now imagine your gearbox in a car nearly 800lbs lighter......plus a euro engine.....thats what mine is.....it gets off corners quite nice!!!
Old 05-24-2015 | 09:07 AM
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Since i recently came into a nice 1985 G28/11 gearbox with LSD, and my 79 RoW box is a bit tired, ive considered going with the G28/11 in the 79. Required TT, shifting links, and cross member changes have already been discussed in another thread, so without pontificating on how much work it is and how many extra parts one needs, what are some drivability opinions on this setup in the 79?
Old 05-24-2015 | 11:38 AM
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Lets share the Goodness of the G-03 trans....I have 2 of them I would like to sell. 1979 model - original from 80k car no lsd -$375 plus shipping....... 1978 model rebuilt including lsd with about 12 DE events on it - $1200 plus shipping.
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Old 05-27-2015 | 05:36 PM
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In about a month, I'll have the 5-speed with LSD from my '79 Spyder available for sale too. With the SC setup and the 2nd gear synchro being badly worn, I'm going with Carls' Z06 6-speed conversion. The extra power has the OEM gears too close together now and once the engine is warm and I car rev in first a bit, I skip 2nd all together since I have to be very patient with that shift due to the condition of the 2nd gear synchro. Downshifts from 4th to 3rd and from 3rd to 2nd, require double-clutching. The car will be a lot more fun when I can run up and down through the gears faster, have longer gears, and 2 overdrives for highway cruising. Other than the synchro issues mentioned above, the gearbox does not have any other issues - doesn't pop out of any gears, pulls smoothly through the full rev range in each, etc. Not much point in me hanging onto it for originality as I don't foresee selling the Spyder any time in the future and it's so unoriginal anyway as a convertible conversion with the SC setup that having the better 6-speed trans is worth more than the current original 5-speed trans.

If anyone is interested, let me know. I'd be able to drop ship it from 928MS in early July once the 6-speed conversion is done and fully tested.
Old 05-28-2015 | 10:33 PM
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I buy early (and late) transmission cores, only for the internal parts.....and will pay to have them shipped.

An "early" core, without limited slip, is worth about $250 to me, plus the shipping.

An "early" core, with limited slip, is worth about $750 to me, plus the shipping.

I never sell one without completely rebuilding them....as a matter of fact, most are just torn apart and used for any of the internal pieces that are still usable.
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Old 05-28-2015 | 11:02 PM
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Originally Posted by GregBBRD
I buy early (and late) transmission cores, only for the internal parts.....and will pay to have them shipped.

An "early" core, without limited slip, is worth about $250 to me, plus the shipping.

An "early" core, with limited slip, is worth about $750 to me, plus the shipping.

I never sell one without completely rebuilding them....as a matter of fact, most are just torn apart and used for any of the internal pieces that are still usable.
^^^ Yes, do this. No better place to send trans core than to Greg Brown. His prices listed are perfectly fair too.
Old 05-29-2015 | 01:10 AM
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Originally Posted by GregBBRD
I buy early (and late) transmission cores, only for the internal parts.....and will pay to have them shipped.

An "early" core, without limited slip, is worth about $250 to me, plus the shipping.

An "early" core, with limited slip, is worth about $750 to me, plus the shipping.

I never sell one without completely rebuilding them....as a matter of fact, most are just torn apart and used for any of the internal pieces that are still usable.
Greg, thanks for the info. I'll be back in touch in about a month.
Old 06-05-2022 | 08:58 AM
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Originally Posted by Lloyd
Lets share the Goodness of the G-03 trans....I have 2 of them I would like to sell. 1979 model - original from 80k car no lsd -$375 plus shipping....... 1978 model rebuilt including lsd with about 12 DE events on it - $1200 plus shipping.
I assume that 1978 rebuilt LSD is long gone by now.
Old 06-06-2022 | 11:47 PM
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Originally Posted by cgraner
I assume that 1978 rebuilt LSD is long gone by now.
I have two early limited slips on my shelf.
Completely rebuilt (by me) and ready to install.
$1250, for the "kit"...everything you need unless if you need different shims for the bearings.
Locktabs, differential bearings, gaskets, o-rings, and seals all included.


All you will need to do is:
Install your ring gear, torque the bolts, install the new locktabs, and install your speedo magnet.
Install the new bearings onto the differential and into the side bearing retainers.
Set-up the preload on the bearings, in the transmission case.
And set-up the backlash.
Old 06-07-2022 | 01:09 AM
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Have a 1978 Euro 5 speed that has the typical synchro issue in 2nd gear. Need to swap out the transaxle or get this one rebuilt/freshened up.
Old 06-07-2022 | 03:43 PM
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Originally Posted by cgraner
Have a 1978 Euro 5 speed that has the typical synchro issue in 2nd gear. Need to swap out the transaxle or get this one rebuilt/freshened up.
Fairly simple to install a limited slip while doing a transmission rebuild.
Old 06-07-2022 | 03:44 PM
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Originally Posted by cgraner
Have a 1978 Euro 5 speed that has the typical synchro issue in 2nd gear. Need to swap out the transaxle or get this one rebuilt/freshened up.
Fairly simple to install a limited slip while doing a transmission rebuild.



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