an a4ld problem

[mjchris]

i have an 87 ranger 4x4 auto (a4ld) the original tranny went bad <suprise>
i replaced it with an 88 b2 tranny i know i dont have overdrive (working on changing valve bodies out) but my main concern when i have it in drive and accelerate really hard from a dead stop it seems to slip but goes right back into gear but if if i pull out slowly it's fine, no slip. please help

 

[Shran]

Are you sure your donor trans was any good to begin with?

 

[mjchris]

it was working fine till i had a friend do a filter change

 

[el_conquistador]

Probably used the wrong size rubber seals. Tranny started sucking air instead of fluid

 

[mjchris]

could that also be the reason it engages gears really rough ,like from 1st to 2nd it feels almost like a shift kit

 

[Fordman]

Make sure throttle pressure cable is adjusted

 

[Bruce]

Make sure throttle pressure cable is adjusted

A4LD's do not have a throttle pressure cable...that is strickly a kick down cable.

Check fluid level on level ground in park with engine running.

 

[Fordman]

Bruce, hate to disagree, but the cable does work as a kickdown, also controls throttle pressure. Try disconnecting it, you will see early slippy shifts. Vachum mod controls line pressure, but cable is throttle pressure.

A4LD's do not have a throttle pressure cable...that is strickly a kick down cable.

Check fluid level on level ground in park with engine running.

 

[Fordman]

clarification.

I will clarify. Modulator, controls line pressure, which affects shift feel, engagement feel, and to a small degree shift timing. The kickdown cable (as it calls it in the atsg manual) is what Ford uses to control throttle pressure, for shift timing, and it doubles as a kickdown trigger. This was all done to try to control more precise shifts for these smaller engines, and driveability. The older trannies like a C-4 or C-5 only use line pressure and governor pressure to control shift feel, and timing. The kickdown lever forces throttle pressure high, forcing the downshift, and then upshifts are totally based on governor pressure. The AOD doesnt use a modulator to control line pressure, it controls line and throttle pressure off the kickdown/throttle pressure linkage. The A4ld is a combo of both, modulator controls line pressure. Kickdown cable also doubles as throttle pressure, controlling shift points and to a degree shift feel. If the older C-4 or C-5 kickdown was left unconnected, upshifts still felt the same, and passing gear was the only symptom. The A4ld kickdown gets left off, the shifts will not occur properly, as well as no passing gear. The atsg manual is a very good manual, but doesnt really give enough info regarding throttle pressure. The cable has a ratchet setup at the firewall, press the metal tab in, and pull out on the cable lightly. Once it has moved out, release the tab, and mash the accelerator pedal to the floor, you should hear the cable adjuster "ratchet" into adjustment. I attended Ford training , was ASE master certified, and trained in Ford, Mopar, and GM transmissions. The factory training also leaves some info out that atsg has. It all falls on experience.

Bruce, hate to disagree, but the cable does work as a kickdown, also controls throttle pressure. Try disconnecting it, you will see early slippy shifts. Vachum mod controls line pressure, but cable is throttle pressure.

 

[Bent Bolt]

I will clarify. Modulator, controls line pressure, which affects shift feel, engagement feel, and to a small degree shift timing. The kickdown cable (as it calls it in the atsg manual) is what Ford uses to control throttle pressure, for shift timing, and it doubles as a kickdown trigger.

No , it is kick down only. Modulator controls line pressure.

 

[Fordman]

True, modulator controls line pressure. Throttle pressure is controlled by the cable. Try unhooking your "kickdown cable" and running it. I will try to scan the factory manual and posting it.

No , it is kick down only. Modulator controls line pressure.