Infamous G50 Rattle or something else?

[ChrisP911]

Bringing it back from the dead..... I have a 87 new clutch less then 100 miles on it. Car idles little rattle.... It goes away when clutch is pressed in. Driving car is great under throttle in all gears quite as can be. Let off gas sounds like a 55 gallon drum rolling down the street, push clutch in goes away.

[KTL]

If you replaced the clutch disc with a common spring-centered disc, the rattling can become more noticeable. These transmissions were originally used with the rubber-centered discs because the rubber also acted as a vibration and noise damper. The noise is transmission mainshaft and/or pinion shaft bearings.

[Rich Gas]

Ah, the coveted G50. First thing listed when selling the heavy 87-89 cars.

[KTL]

It's noisy when it gets old but it still is much more durable than a 915. A worn out G50 is a lot more manageable than a worn 915. G50 will keep on truckin' fairly well. Eventually a 915 will refuse to work or even worse, self-destruct. That said, i'm very fond on the 915. Straighforward to work on and works great when maintenance is attended to.

[Rich Gas]

No offense, but I'm calling BS on that...the 915 is a racing derived tranny. The G50 was designed to pull the tractor trailer size 87-89 Carreras full of all their luxury add-ons. Think bloated house wife.

[Tippy]

Originally Posted by Rich Gas

No offense, but I'm calling BS on that...the 915 is a racing derived tranny. The G50 was designed to pull the tractor trailer size 87-89 Carreras full of all their luxury add-ons. Think bloated house wife.

There's only one 911 I know of that could break a G50, and that was Eddie Bello. Once it hit 1350ft/lbs of torque, it blew 3rd.

915's break with stout 3.6/3.8's.

So how again is a 915 racing derived and a G50 is not?

[Rich Gas]

Nice logic Tippy...the 915 has been around for years, being refined, without gaining weight and complexity. Keep it simple stupid. Think Lotus. Dangerous, but light. Bello's car is cool.

[Matt Monson]

Originally Posted by Rich Gas

No offense, but I'm calling BS on that...the 915 is a racing derived tranny. The G50 was designed to pull the tractor trailer size 87-89 Carreras full of all their luxury add-ons. Think bloated house wife.

I think by the time they retired the G50/G96 family of gearboxes last year it was pretty well evolved into a modern racing gearbox. Served the 997 Cup Car in sequential form for a decade.

[Rich Gas]

Hi Matt...yeah ok...but I get so tired of the G50 crowd. The new guys and the car salesman types just use it as the one thing that makes the 87-89s special. My 915 is great, after 1st and 2nd gear synchros, new bushings, new wevo coupler.

[Matt Monson]

Originally Posted by Rich Gas

Hi Matt...yeah ok...but I get so tired of the G50 crowd. The new guys and the car salesman types just use it as the one thing that makes the 87-89s special. My 915 is great, after 1st and 2nd gear synchros, new bushings, new wevo coupler.

Agreed. I love my 915 and 901/914 gearboxes.

Though if one wants a real race born gearbox he gets a 901. The 915 is what the bean counters made when they refused to give up on Porsche's proprietary split ring synchro for another 15 years when Getrag was already making gearboxes with Borg-Warner synchros that shifted much much nicer.

[Tippy]

Originally Posted by Rich Gas

Hi Matt...yeah ok...but I get so tired of the G50 crowd. The new guys and the car salesman types just use it as the one thing that makes the 87-89s special. My 915 is great, after 1st and 2nd gear synchros, new bushings, new wevo coupler.

I guess I jump on this argument too because I'm over 600hp. I HATE worrying about breaking transmissions. The G50 eliminates this 100%.

If I was NA, I could see the benefits of a lighter 915, but I'm not.

[Rich Gas]

Hey Tippy, what year is your 3.2/G50 combo that you turbo charged? I'd like a ride in that.

[Ronnie's.930]

Originally Posted by Rich Gas

Think bloated house wife.

Like this, Rich ?!?!?!

[Matt Monson]

Here's Ronnie!

[COLB]

Originally Posted by Ronnie's.930

Like this, Rich ?!?!?!

The Moose Knuckle…the larger, less well-known relative of the camel toe…..

[Rich Gas]

Hey Ron, what're you talking about...that's one hot momma!

[Tippy]

Originally Posted by Rich Gas

Hey Tippy, what year is your 3.2/G50 combo that you turbo charged? I'd like a ride in that.

87. It's a 3.4L now.

[Rich Gas]

Sorry Tippy, didn't mean to spook you. I'm harmless. I do like fast cars though!

[Ronnie's.930]

Rich, yer not that spooky, bro, and plus, Tippy doesn't scare easily!!!

How's it going Matt? Do you like moose knuckles like Colb and Rich do (hardy har har)?!?!?! Want more pics of such???

[Matt Monson]

Ronnie,
You are spooking me! I thought you liked little boys, not big girls...