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#1967573 - 01/29/10 01:49 AM "civilian" and "police" transmission differences?
CV_p71_W Offline
Member

Registered: 11/09/09
Posts: 227
Loc: NorthWest Indiana
I'm wondering because I'm planning on purchasing a transmission
and most of the listing for a 4R70W or grand marquis/crown victoria transmission won't fit the police model.

One thing I've heard is the tail shaft length is different.

Here's an example:
http://cgi.ebay.com/ebaymotors/TRANSMISS...=item1c0f29375c

Thanks.
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"The word God is for me nothing more than the
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Bible a collection of honorable but still primitive legends
which are nevertheless pretty childish" - Albert Einstein

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#1967580 - 01/29/10 01:57 AM Re: "civilian" and "police" transmission differences? [Re: CV_p71_W]
martz0r Offline
Over the Hill

Registered: 04/29/08
Posts: 4295
Loc: Punta Gorda, FL
Pretty sure there is no difference. Someone will chime in with a definite answer though.
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'07 Durango HEMI Limited 4x4
Previously: '90 Grand Marquis LS |'97 LTC|'03 LX-Sport|'06 P71|'03 P71|
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#1967583 - 01/29/10 02:01 AM Re: "civilian" and "police" transmission differences? [Re: CV_p71_W]
dRock96Marquis Offline


Posting Addict

Registered: 02/22/05
Posts: 24394
Loc: Maryland
Retail model CV/GMQ use the 'short' tailshaft housing and output shaft


CVPI, Town Cars and Marauder use the 'long' tailshaft housing and output shaft


In general, a retail model transmission will work in CVPI (same or compatible model year), but you will either have to swap to the steel d/s - or swap your old extended tailshaft housing and re-use your aluminum CVPI shaft. (If you do this, you also need to plug the small vent in the middle of the CVPI d/s slip yoke or you will have a tiny ATF leak when used with the short output shaft)



What year is your car?


2vmodular has a ton of year to year transmission info here;
https://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=1295031#Post1295031
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Former owner of a Grand Marquis with a few mods, Grand Marquis "LSE S/C"

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#1967585 - 01/29/10 02:07 AM Re: "civilian" and "police" transmission differences? [Re: dRock96Marquis]
CV_p71_W Offline
Member

Registered: 11/09/09
Posts: 227
Loc: NorthWest Indiana
It's 1999 CVPI
_________________________


"The word God is for me nothing more than the
expression and product of human weaknesses the
Bible a collection of honorable but still primitive legends
which are nevertheless pretty childish" - Albert Einstein

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#1967663 - 01/29/10 08:01 AM Re: "civilian" and "police" transmission differences? [Re: dRock96Marquis]
Darrin Offline
BCAutomotive
Climber

Registered: 01/29/02
Posts: 513
Loc: Danville, IN 46122
 Originally Posted By: dRock96Marquis
CVPI, Town Cars and Marauder use the 'long' tailshaft housing and output shaft


In general, a retail model transmission will work in CVPI (same or compatible model year), but you will either have to swap to the steel d/s - or swap your old extended tailshaft housing and re-use your aluminum CVPI shaft. (If you do this, you also need to plug the small vent in the middle of the CVPI d/s slip yoke or you will have a tiny ATF leak when used with the short output shaft)


You can use the shorter tailshaft transmissions in a car that came with a long tailshaft. As stated, use your longer housing with it though.

But. lets also make it very clear that you cannot use the longer tailshaft transmissions in a car that had the short tailshaft unless you replace the driveshaft to match. It's very bad having not enough clearance in the driveline. VERY bad.

Darrin

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#1967909 - 01/29/10 03:56 PM Re: "civilian" and "police" transmission differences? [Re: Darrin]
BlaineB Offline
Over the Hill

Registered: 09/21/06
Posts: 4379
Loc: Indiana
Interesting read. Thought there were differences with the transmissions as well until I spoke with drock.... I had known about the different output shaft and tail housing......as well as the output shaft for civilian being 8 tooth while the CVPI output shaft is 7 tooth.

So really the only differences are the flexplate and torque converter. I am already running the CVPI aluminum driveshaft with my civilian short output shaft and short tail housing and there seems to be no issues. I have been running it like that for a year as a matter of fact.

The only thing to do is thet the CVPI torque converter and flexplate to match and I think I will be very pleased with this car......running the P71 PCM and the civilian torque converter makes for some interesting shifting at times......a bit confused I suppose since it is programmed for an entirely different torque converter.

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