[Baron Von Zeppelin]

Axle -Sales Code 37R is 3.07 ; UPC is GX1

Just my suspicion
I don't trust that particular glossary from PHS.
They have had goofs before.

37R - 3.73 sounds more in line , and jives with the option restrictions.
Bird and Goat have always shared the same axle designator suffix when they were the same ratio.

[Ramairnacho]

Originally Posted by johnta1

Here's what I found:

Code - 348
UPC Code - L74
Available Formula; Standard TA

400 ci Ram Air V8 4BBL (RAM AIR III)
Ram Air III: Not available with 2 Speed Auto Trans (352), Turbo Hydramatic Trans (359), or Mountain Performace Axles (754)


Code - 347
UPC Code - LS1
N/Available Formula; Available TA


400 ci Ram Air V8 4BBL (RAM AIR IV)
Ram Air IV. Not available with Air conditioning (582)

-----------------------------------

Code - 361
UPC Code - G80
Standard - TA

Safe T Track differential
Requires performance axle (368) axle


-----------------------------------

Code - 368
UPC Code - G90 Performance Axle

-----------------------------------

Code - 358
UPC Code - M21
Available Formula; Available TA

Close Ratio 4 Speed Manual Transmission with Hurst Floor Shift
Requires Safe T Track Differential (361).

Formula 400 with Peformance Axle (368) - $195.36
Trans Am with Performance Axle (368) - No Charge


-----------------------------------

Im.still learning this stuff and quick.questiin. The 348 code is tam.air option correct? Is mountain gear a 331 open cou code axel? My formula is ram air but no posi different than this nice 4 speed car and mine has the m40 auto with a/c.

[unruhjonny]

for 1970 there was both a code number and a UPC code used;
The code number was used on the order sheet;
You should have a copy of the master order sheet if you purchased a PHS packet for your car;
In the middle column-top is the engines section "34" - look there for the following:

• 34-1 is the inline six; UPC not shown because it's standard (and only available) in the base "23" model;
• 34-2 is the 350/2bbl; UPC is shown because it's optional on the base car.
• 34-6 is the 400/2bbl; UPC shown because it's optional on the Esprit.
• 34-5 is the 400/4bbl; UPC not shown because it's not an optional engine (std in Formula)
• 34-8 is the 'Ram Air III'; UPC shown because it's optional on the Formula
• 34-7 is NOT shown, but a blank line is left for it; this was supposed to be a 'super duty' version of the RAIV for 1970 (RPO LS1'); it was supposed to be specific to the Firebird, but it was axed - and later the "regular" L67 from the GTO's was used. I have found nothing indicating that there was no intent to offer it in the Formula (as John typed), but rather, when PMD finally released it as RPO L67, for what ever reason, only 88 were installed in Trans Am's.

[Baron Von Zeppelin]

754 would most likely show on your invoice for Mountain Performance Axle.
Hard to recall because think I have only seen one or two of these cars with it.
Usually a Colorado thing.

There was an orange Formula several years back that the seller made a lot of wild claims about.
I think it was a mountain car

[johnta1]

In the chart I posted, it shows 3.31 and 3.36 gears.
The 3.31 is 12 bolt rear and the 3.36 is the 10 bolt I believe?


Don't know if they had other ratios? (as the Mountain Perf option)

[keith k]

Originally Posted by johnta1

In the chart I posted, it shows 3.31 and 3.36 gears.
The 3.31 is 12 bolt rear and the 3.36 is the 10 bolt I believe?

Right-

[Ramairnacho]

Originally Posted by johnta1

In the chart I posted, it shows 3.31 and 3.36 gears.
The 3.31 is 12 bolt rear and the 3.36 is the 10 bolt I believe?


Don't know if they had other ratios? (as the Mountain Perf option)

is mountain gear a 10 bolt then not 12 bolt? I thought it was a 331 open but im.no expert

[johnta1]

I think if it has a 12 bolt in car it would be 3.31, if a 10 bolt it would be 3.36.


12 bolt only in 400 engine Birds.

[Ramairnacho]

Originally Posted by johnta1

I think if it has a 12 bolt in car it would be 3.31, if a 10 bolt it would be 3.36.


12 bolt only in 400 engine Birds.

What is code 348 ram air 3 400 code mean? is that for trans am only? This is interesting stuff.

[johnta1]

It would be WS for manual or YZ for TH400. Used in Formula/Trans AM or GTO.

[poncho-mike]

I had a very early build 1971 Trans Am with a 3.07 12-bolt limited slip. It was an automatic a/c car. It was very original, I don't think it had ever been modified. The roof was damaged after a tree fell across the garage it was stored in during a hurricane. Both the carb and distributor were dated early July 1970.

[Baron Von Zeppelin]

348 is on your PHS Invoice for your Formula , Nacho.

Maybe someone with good books can break down code 754 Mountain Perf Axle.
I don't know how it applies or why it would have such a special name.

But it wasn't available with Ram3 engines.
Meaning the ratio was probably comparable to what those already came with as standard.