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Revision as of 05:10, 17 July 2007

Automatic-equipped cars had a significantly larger front tunnel area. The rear of the tunnel is the same. For this reason you can easily convert an Auto car to a Manual car. Going to automatic you, may need to modify the tunnel.

If you convert your originally automatic 1200 to a manual, you will notice that you have barely any room between the gas and brake pedals and you have to do tip-toe driving to make it work.

Also see: Automatic Transmission Overview

Auto vs 60

Replace the auto pedals with its larger brake pedal with the standard setup that has small brake pedal and clutch pedal.

'Bridge' the start inhibit wires that go to the auto gearbox
Replace the spacer in pedal box with clutch pedal (requires removal of dash and pedal box)
Knock out the clutch firewall hole blanking plate
1. In manual cars there are nuts welded from factory on the inside but autos don't. You can either put bolts and nuts thru the holes or weld some
Install clutch cable
Engine: remove flex plate and spacer
1. add pilot bushing (if not already fitted)
2. add flywheel, clutch disc and pressure plate
Mount: either weld new mounts in or make a new crossmember
Replace gearbox and auto tailshaft with manual versions

The speedo cable is the same.

Gearbox mounts are different, but is the shifter hole in the tunnel is in the same place (the rear portion of the tunnel is the same).

Reportedly 5-speed (60-series?) fits on the automatic crossmember -- pure bolt in.

Shifter

Automatic shifter come with a Console.

The shifter boot will have to be used from another type of car because the automatic hole is larger than the standard shifter hole. Reportedly a boot from a 1980s Ford Escort will fit.

Driveshaft

The automatic has a larger spline. So use the auto driveshaft with auto transmission. Remember that B110 and B210 Driveshaft is the same. The B210 and B110 driveshafts are the same length. Only automatic vs manual lengths are different.

Rear Engine Mount

The rear engine mount, also called the "transmission crossmember" is mounted about six inches further back.

4-speed mount

auto mount

B210 and B310 have multiple crossmember mounting hole locations:

The B210 has a single set, which differs between auto and manual cars.

Part Numbers

Rubber Mount

11321-H1000 ASSY-INSULATOR ENGINE MOUNTING REAR Manual trans
11321-H1020 ASSY-INSULATOR ENGINE MOUNTING REAR Manual trans

Crossmember

11322-H1002 MEMBER-ENGINE MOUNTING REAR Manual
11322-H1020 MEMBER-ENGINE MOUNTING REAR Automatic

NOTE: B210 parts number are different from B110, but reportedly fit the same.

Engine Differences

Carburetor

For emission controls, the carb differed. However you can use any carb with an automatic.

Distributor

Auto cars had a different distributor curve for emission control. However you can use any distributor with an automatic.

Clutch Fittings

Automatic cars don't have:

Clutch pedal
Clutch master cylinder (LHD models)
Clutch cable (RHD models)

These parts can be swapped from a manual car.

On the US AT models the hole for the clutch master is there but is covered up with a sheet metal cover that is spot welded in place. Takes a cold chisel, hammer, and some patience to uncover. The mounting studs need to be sourced as they are missing.

On RHD, grind off the plate where the clutch cable comes out of the fire wall and get some nuts to bolt the thing to the firewall.

Starter Motor

Starter for automatic transmission differs from starter for manual transmission. But otherwise A12 & A14 starters interchange.

Flex Plate

Automatics don't use a flywheel, the torque convertor has enough mass to act as the flywheel. They use a thin "flex plate" with has the ring gear teeth for the starter.

flex plate

Also note the crankshaft adapter.

You can use the flywheel off the A14 on the A15. The thing to look at is the back of your A15's crankshaft -- make sure it has the hole for the trans pilot shaft bearing.

Crankshaft

Spacer

the A-14 engine with an automatic has a lip on the end of the crankshaft that might have to be ground down with a grinder to mate to the manual tranny. Then you will be set to mate them together.

spacer

Pilot Bearing

spigot bush/pilot bushing

Kick down Switch

Check around the top of the throttle pedal, with autos there should be either a bracket for the kick down switch,or maybe the switch is still there

Tunnel

The Auto body has seperate tunnel and floor. The tunnel is spot welded in. The seam is clearly noticeable on the firewall at the back of the engine.

Manual body has one piece floor and tunnel, no joins whatsoever. Bellhouseing part of tunnel is one piece with firewall.

auto std

NOTE: Unlike a B110 the B210 has a uniform floorpan between auto and manual.

Swapping Tunnel panels

The standard B110 tunnel is one piece.

The Auto tunnel is two pieces.

Modified Tunnel

Just take a big hammer and bang the tunnel sheet metal ("massage it")to get more clearance.

"massaged" floor

Or cut part of the tunnel and weld on a bigger section.

Custom Tunnels

Others have successfully bolted or welded in tunnels from:

B210
Stanza (1980 510)
180B (610)
Custom fabricated tunnels

Tunnel Photos

Cooling

Autos used:

(optional) larger radiator. A B210 radiator is a direct bolt-in
Radiator Shroud
(optional) Flex fan

All are a good idea for standard or manual tranmission cars.

Wiring

Check the engine wiring loom to see if there is prevision for the auto inhibitor switch. This prevents the engine from being started unless the auto is in P or N (park or neutral)

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Manual transmission conversion