Author Topic: W code poll - Detroit? Trac-Loc? build date?  (Read 15902 times)

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Offline ex2409pilot

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W code poll - Detroit? Trac-Loc? build date?
« on: July 16, 2013, 03:08:58 pm »
It has become pretty apparent that starting sometime around mid Feb 1970 and ending in late March 70, W code cars that were ordered with a Traction-Loc actually got the Detroit Locker instead. In an effort to learn more about this phenomenon, I thought it might be interesting to see if we could narrow down a more accurate starting and ending time with some owner participation.

I invite all W code owners to post their Martis and build sheets but particularly interested in cars built in the time slot mentioned above give or take a month since the practice could have started sooner or ended even later that currently thought. My theory is they simply ran short on TL's and stuck Detroits in so if you have a W code built in this time frame and it was ordered with a TL and shipped with a TL then that shoots a hole in my idea of why. Please post or report what your axle tag and build sheet states as 979A code is the only proof positive you have a Detroit.

1970 BOSS 302 - W code
1970 Sportsroof  - SCJ - W code - 4 speed - project
1970 Ranchero GT - 429 - C6

Offline CaBossFan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #1 on: July 17, 2013, 03:48:36 pm »
0F02G154141 was built at Dearborn on January 16, 1970.  The Marti Report indicates that it was a W-Code with a "4.30 Locking Axle Ratio," although the build sheet shows it had a 979A Detroit Locker:




Offline CCBossMan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #2 on: July 17, 2013, 06:03:22 pm »
0F02G159483 was built on 1/28/70.  The Marti shows locking differential, and unfortunately I don't have a build sheet to compare it to.  I did, however, get the reproduction axle tag and it shows 983A.  Not sure if Marti's information comes directly from the build sheet data codes, but if so, I would assume the TL is correct.


Offline mfield2a

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #3 on: July 17, 2013, 09:02:58 pm »
Good thread!  I'll post pics of my Marti, Eminger, axle tag and build sheet when I get home this weekend.

979A W Code; Saker' up front, Spoiler' in the rear.

Offline STEVEG

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #4 on: July 18, 2013, 03:51:55 am »
I was told opposite when researching my car with Kevin. My build sheet shows DL,but invoice shows TL.


Offline CaBossFan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #5 on: July 21, 2013, 10:38:06 am »
Based on the 2011 Registry, there were 26 W-Codes built at Dearborn between January through March 1970.

Offline splxboss

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #6 on: July 21, 2013, 01:41:51 pm »
I was told opposite when researching my car with Kevin. My build sheet shows DL,but invoice shows TL.
  The short answer the operator knows he is out of a DL 430 or a TL 430 so he uses the 430 he does have OR he grabs the wrong one he tells his boss who in turns tells q/c who tells well its gets to the person who makes the decision to change the invoice or change the axle.
  I did this very operation for 5 yrs at ford. when the forklift driver told me we were out of a specific  axle i knew what the sub was and just used it and told the boss  the unit number and he passed the info on
1970 boss  w code
1970 shelby 350
1970 torino cobra
1960 corvette
1940 chevy

Offline STEVEG

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #7 on: July 21, 2013, 04:56:02 pm »
I understand the line can't stop to wait for the correct rear, just trying to supply accurate info.My build date is 02/13/70 Dearborn. Build sheet has 979A, but has 983A.


Offline CaBossFan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #8 on: July 22, 2013, 05:48:08 pm »
According to the Eminger Report, the difference in price for a Detroit Locker and a Traction-Lok differential was $9:




Offline ex2409pilot

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #9 on: July 24, 2013, 08:40:31 am »
A big thanks to those who provided input but unfortunately with only 4 owners responding it's hard to reach any conclusions. From the info provided, however, it looks like it started a little earlier than first thought with a Jan 16 built car. Looks like my 3/18 built car is one of the last based on what we know now.

I haven't kept any notes but do remember 5 or 6 other cars that have surfaced in the last few years built during this time frame with the Detroit anomaly. I really wouldn't be surprised if this happened intermitently throughout the  production year.

To further cloud the issue it's fairly common knowledge over on the CJ side of things that no 1970 4.30 CJ car got a Detroit until late Nov 69, even though early model year literature stated all CJ 4.30 cars would get a Detroit. Intrigued by this, I remember asking a few years ago if any Boss owners got a Detroit prior to late Nov and one guy responded and said his Boss was built in August and had a Detroit. The mystery continues....
1970 BOSS 302 - W code
1970 Sportsroof  - SCJ - W code - 4 speed - project
1970 Ranchero GT - 429 - C6

Offline cjmustangman

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #10 on: July 24, 2013, 09:58:49 am »
My car 0F02G158420 built Jan 26, 1970 shows 0979A on the build sheet and trac loc on the Marti report.
Arild
Arild
2013 Boss 302
1970 Boss 302
1969 Boss 302

Offline CCBossMan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #11 on: July 24, 2013, 01:40:46 pm »
My car 0F02G158420 built Jan 26, 1970 shows 0979A on the build sheet and trac loc on the Marti report.
Arild

Interesting our cars were built 2 days apart, and your MARTI states "Traction-Lok Differential" and mine just says "Locking Differential."  Maybe it's just the wording Marti has used; my report is from 2004 and yours is 2011.

Offline CaBossFan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #12 on: July 24, 2013, 07:33:37 pm »
I had a copy of the Marti Report for 0T02G164737, which shows "4.30 Locking Axle Ratio" for the Door Data Plate Information, with options "Detroit Locker Differential" and "Locking Differential:"




Offline ASedan

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #13 on: July 24, 2013, 10:13:42 pm »
Hey Darrell,
So are you saying the invoices can't be trusted either?  Can't help you with mine - July build.  Invoice and tag indicate locker.
Dave

Offline McKeever

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Re: W code poll - Detroit? Trac-Loc? build date?
« Reply #14 on: July 24, 2013, 10:36:45 pm »
Unless I've got this wrong..

Build sheet and axle tag must match.. that's the only positive proof
Anything else is speculation..
Owned my BOSS since March 1974.
0F02G154740 Dearborn 1-16-70
Honesty is doing the right thing with a witness.
Integrity is doing the right thing without one.
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