BW 1356 Electric shift

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87BRONCXLT302

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My 17 year old & his buddy just replaced the transfer case with a reman. All appears to work well. We have 2 questions after finishing the job..

when we separated the xfer case from the transmission adapter I would say about 3 or 4 quarts of ATF came out. Is there supposed to be ATF in this area is question number 1.  I think we had to add about the same amount that came out, back into the transmission.

Number 2 is that the speedo reads about 10 mph high. We re-used the old speedo. Why would the speedo be off so much?

we also replaced u-joints on front & rear and rebuilt the cardon joint which eliminated shift clunking from drive shaft backlash.

Overall not bad for a couple of millennials!

 

miesk5

96 Bronco 5.0
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Yo 87BRONCXLT302,

High Fluid Level & Low Transmission Fluid Level And Or Shift And Or Engagement Concerns TSB 97-12-13 for 87-96 Bronco & many others; "...transmission may have low fluid level and/or may have either a shift concern and/or an engagement concern. This may be caused by transmission fluid leaking from the transmission into the transfer case through the transfer case input seal. Replace the transfer case input seal..." read more @ http://www.thedieselstop.com/faq/9497faq/tsb/tsb/files/971213.pdf

On the speedo:

84-91 has VSS on speedometer cable located on the tail housing of the transfer case (drivers side).  Was the driven gear replaced or maybe the remans case drive gear has a different ratio?

Driven Gear Change in a 90 (in Xfer Case Tail Housing) 
Source: by Keith L (TTB Blows, Bling-Bling)

Driven Gear Calculator, Ford 
Source: by Jim R

....

Gear Change Calculator w/Ford Part Numbers, Colors, & Tooth Count 
Source: by Chris B (Blue, bronco boy

Or were tires replaced with diff size?

"TSB 89-2-7 PUBLICATION DATE: January 25, 1989

FORD
1990 and prior All Car Lines and LIGHT TRUCK
ISSUE The accuracy of speedometer/odometer readings may be influenced by several vehicle components or systems. The information in this TSB article is intended to assist technicians in speedometer/odometer concern diagnosis.
ACTION Use the following supplemental information to assist in speedometer/odometer diagnostics.
Operation
A mechanical analog speedometer displays vehicle speed and the odometer displays total distance traveled. The speedometer/odometer assembly is cable driven by either a transmission or a transaxle. All speedometer/odometer assemblies, except for police vehicles are the same with respect to the speed accuracy tolerance used during calibration. The odometer gear ratio is fixed so that all are identical and have no error in the speedometer head.
Several areas of concern that may affect speedometer/odometer readings are tires, axle gear ratio and speedometer/odometer drive and driven gears.

Tires
Improper tire rolling radius and inflation pressure, temperature and size may contribute to inaccurate system readings. System accuracy testing should be performed after the tires are set at the correct pressure as shown on the safety compliance certification label. The tire should be warmed for a short period. Best results are obtained on smooth, dry pavement while driving at a constant speed within the posted speed limit.

Axle/Transaxle Ratio
The gear ratio of the rear axle or the final drive ratio of the transaxle must be known to select or check if the proper speedometer/odometer drive and driven gears are present. Various gear ratios are available, but usually are not a concern when dealing with speedometer/odometer concerns unless the gear ratio has been changed.

WARNING:
NEVER CORRECT SPEEDOMETER READINGS BY CHANGING GEARS UNLESS THE ODOMETER IS ALSO OFF.

Drive/Driven Gears
The speedometer/odometer drive gear is located inside the transmission, transaxle or transfer case and is not easily accessed for change. The driven gear rotates the speedometer cable. Rear wheel drive vehicles have several driven gears with various numbers of teeth available to correct input to the speedometer/odometer head. Front wheel drive vehicles generally do not offer different gears for correction.

General Description
The maximum allowable odometer system accuracy error is ± 3.75% of the actual distance traveled. Ford Motor vehicles are well within those limits."

..

they did very well indeed pop!

our #1 son was slamming cars at 17, could always fibd him by following the oil leak trail.  Then he started building oil pan skid plates for stangs and escorts.  Lol

 

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