chevrolet truck Light Duty Truck 1994 Series Repair Manual Download

Page: 243 / 919

A DJU STIN G BACKLASH

Tools Required:

J 8001 Dial Indicator Set

1. Refer to figures 1 through 4.

2. Tighten the right sleeve (32) to 140 N-m (100 lbs.

ft.) using J 36599 (figure 28).

3. Tighten the left sleeve (32) (K1, 2 models) or

adjuster plug (61) (K3 models) to 140 N-m (100
lbs. ft.).

• Use J 36599 (K1, 2 models) (figure 28).
• Use J 36615 (K3 models) (figure 29).

4. Mark the location of the adjusting sleeves in rela

tion to the carrier halves, so the notches in the
adjusting sleeves can be counted when turned.

5. Turn the right sleeve OUT two notches.
6. Turn the left sleeve (K1, 2 models) or adjuster plug

(K3 models) IN one notch.

7. Rotate the pinion several times to seat the bear

ings.

MEASURING BACKLASH

1. Install a dial indicator so the button contacts the

outer edge of the pinion flange. The plunger must

be at a right angle to the pinion flange (figure 31).

2. Move the pinion flange through its free play while

holding the differential carrier. Record the dial indi
cator reading.

3. Divide the dial indicator reading by 2 to obtain the

actual  backlash  when  using  this  method.  Example:
A  dial  indicator  reading  of  0.16  mm  means  that
there  is  actually  0.08  mm  backlash.

F5875

4. Follow the steps for adjusting backlash.

• Gear backlash should be between 0.08-0.25

mm (0.003-0.010 inch) with a preferred specifi
cation of 0.13-0.18 mm (0.005-0.007 inch).

• If the backlash is incorrect, adjust the sleeves

as necessary. Always maintain the “ one notch”

preload  on  the  side  bearings.  Example:  If  it  is
necessary  to  turn  the  RIGHT  sleeve  IN  one
notch,  the  LEFT  sleeve  must  be  turned  OUT
one  notch.

• To increase backlash, turn the left sleeve in,

and  turn  the  right  sleeve  out  an  identical
amount.  To  decrease  backlash,  turn  the  right
sleeve  in  and  turn  the  left  sleeve  out  an  identi
cal  amount.

• Changing the sleeves one notch will change

backlash about 0.08 mm (0.003 inch).

GEAR TOOTH CONTACT

PATTERN CHECK

Before final assembly of the differential, a gear tooth

contact pattern check should be performed.

A gear tooth contact pattern check is NOT a substi

tute for adjusting pinion depth and backlash as previ
ously outlined. It is a final check to verify the correct

running  position  of  the  ring  gear  and  the  drive  pinion.
Gear  sets  which  are  not  positioned  properly  may  be
noisy,  or  have  a  short  life,  or  both.  With  a  pattern
check,  the  best  contact  between  the  ring  gear  and  the

drive pinion for low noise level and long life can be
ensured.

GEAR TOOTH TERMS

The side of the ring gear tooth which curves outward,

or  is  convex,  is  referred  to  as  the  “ drive”  side.  The
concave  side  is  the  “ coast”  side.  The  end  of  the  tooth
nearest  center  of  ring  gear  is  referred  to  as  the  “toe”
end.  The  end  of  the  tooth  farthest  away  from  the  center

chevrolet truck Light Duty Truck 1994 Series, Repair Manual

Search results

Summary of Contents for Light Duty Truck 1994 Series

Reviews:

Related manuals for Light Duty Truck 1994 Series

Brands by name

Popular brands